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공개 퀴즈 목록 (256개 중 81-100)
| ID | 과목 | 파일명 | 문제 수 | 퀴즈 타입 | 소유자 | 통계 조회/가져오기 |
등록일 | 작업 |
|---|---|---|---|---|---|---|---|---|
| 368 | 🔬 Science |
science_quiz6_8_health_disease
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 367 | 🔬 Science |
science_quiz6_7_human_body_systems
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 366 | 🔬 Science |
science_quiz6_6_dna_genes_heredity
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 365 | 🔬 Science |
science_quiz6_5_cell_division
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 364 | 🔬 Science |
science_quiz6_4_cellular_respiration
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 363 | 🔬 Science |
science_quiz6_3_photosynthesis
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 362 | 🔬 Science |
science_quiz6_2_cell_processes_transport
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 361 | 🔬 Science |
science_quiz6_1_cell_structure
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 360 | 🔬 Science |
science_quiz5_8_waves
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 359 | 🔬 Science |
science_quiz5_7_electromagnetic_induction
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 358 | 🔬 Science |
science_quiz5_6_electromagnets_motors
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 357 | 🔬 Science |
science_quiz5_5_magnetism
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 356 | 🔬 Science |
science_quiz5_4_series_parallel_circuits
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 355 | 🔬 Science |
science_quiz5_3_ohms_law_circuits
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 354 | 🔬 Science |
science_quiz5_2_current_voltage_resistance
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 353 | 🔬 Science |
science_quiz5_1_static_electricity
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 352 | 🔬 Science |
science_quiz4_8_forces_real_world
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 351 | 🔬 Science |
science_quiz4_7_motion_graphs
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 350 | 🔬 Science |
science_quiz4_6_pressure
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
| 349 | 🔬 Science |
science_quiz4_5_momentum_conservation
|
25문제 | 🛡️ 교강사 | admin | 👁️ 0 / 📥 0 | 2025-11-25 14:16:20 |
|
📖 science_quiz6_8_health_disease
Infectious disease is caused by:
1. Accidents
2. Genetics
3. Pathogens ✓
4. Poor diet
Pathogens include:
1. Nutrients
2. Bacteria, viruses, fungi, protists ✓
3. Only viruses
4. Only bacteria
Non-infectious disease:
1. Spreads easily
2. Cannot spread person-to-person ✓
3. Only from bacteria
4. Always contagious
Bacteria are:
1. Eukaryotic
2. Not living
3. Viruses
4. Prokaryotic cells ✓
Viruses are:
1. Always harmless
2. Cells
3. Not cells, need host to reproduce ✓
4. Bacteria
Antibiotics work against:
1. Bacteria ✓
2. Only cancer
3. All diseases
4. Viruses
Antibiotics don't work on viruses because:
1. Viruses lack bacterial structures targeted ✓
2. Viruses too strong
3. Wrong color
4. Viruses too large
Antibiotic resistance develops from:
1. Exercise
2. Overuse and misuse of antibiotics ✓
3. Eating well
4. Natural immunity
Immune system function:
1. Breathe
2. Digest food
3. Defend against pathogens ✓
4. Pump blood
First line of defense:
1. Antibodies
2. T cells
3. Vaccines
4. Skin, mucus, stomach acid ✓
Phagocytes:
1. Red blood cells
2. White blood cells that engulf pathogens ✓
3. Platelets
4. Bacteria
Antibodies are:
1. Bacteria
2. Viruses
3. Proteins binding specific antigens ✓
4. Blood cells
B cells produce:
1. Antibodies ✓
2. Pathogens
3. T cells
4. Red blood cells
Memory cells provide:
1. Nutrients
2. Oxygen
3. Immunity (remember pathogens) ✓
4. Energy
Active immunity means:
1. Temporary protection only
2. Receive antibodies from outside
3. No immunity
4. Body makes own antibodies ✓
Passive immunity means:
1. No antibodies
2. Body makes own
3. Receive antibodies from outside ✓
4. Permanent protection
Vaccines contain:
1. Weakened/dead pathogen or parts ✓
2. Live dangerous pathogens
3. No biological material
4. Antibiotics
Vaccines work by:
1. Providing immediate treatment
2. Removing pathogens
3. Killing all bacteria
4. Creating memory cells without disease ✓
Herd immunity means:
1. Enough people vaccinated to stop spread ✓
2. Animals protected
3. No one vaccinated
4. Everyone sick
Disease transmission includes:
1. Only food
2. Only air
3. Only water
4. Direct contact, droplet, airborne, vector ✓
Best way to prevent infection:
1. Never leave house
2. Wash hands frequently ✓
3. Take antibiotics daily
4. Avoid all people
Healthy lifestyle includes:
1. No sleep needed
2. Balanced diet, exercise, sleep, no smoking ✓
3. Only diet
4. Only exercise
Type 2 diabetes is:
1. Lifestyle-related, non-infectious ✓
2. Always genetic only
3. Caused by virus
4. Contagious
Cancer risk reduced by:
1. Not smoking, healthy diet, exercise ✓
2. Smoking
3. Poor diet
4. No exercise
Global health challenge:
1. Everyone healthy
2. Too many vaccines
3. No diseases left
4. Antibiotic resistance ✓
📖 science_quiz6_7_human_body_systems
Circulatory system function:
1. Thinking
2. Digestion
3. Transport materials throughout body ✓
4. Breathing
Heart has how many chambers?
1. Three
2. Four (2 atria, 2 ventricles) ✓
3. Two
4. One
Arteries carry blood:
1. Nowhere
2. Away from heart ✓
3. Only to lungs
4. To heart
Veins carry blood:
1. Nowhere
2. Only from lungs
3. Away from heart
4. To heart ✓
Gas exchange occurs in:
1. Trachea
2. Nose
3. Alveoli ✓
4. Bronchi
Diaphragm is:
1. Muscle below lungs for breathing ✓
2. Bone protecting lungs
3. Air tube
4. Blood vessel
Digestion begins in:
1. Mouth ✓
2. Stomach
3. Large intestine
4. Small intestine
Most nutrient absorption occurs in:
1. Stomach
2. Small intestine ✓
3. Mouth
4. Large intestine
Large intestine mainly absorbs:
1. Proteins
2. Glucose
3. Water ✓
4. Vitamins only
Liver produces:
1. Saliva
2. Gastric juice
3. Insulin
4. Bile ✓
Pancreas produces:
1. Only saliva
2. Digestive enzymes and insulin ✓
3. No secretions
4. Only bile
Brain is part of:
1. Digestive system
2. Peripheral nervous system
3. Central nervous system ✓
4. Circulatory system
Nerves throughout body are:
1. Peripheral nervous system ✓
2. Not nervous system
3. Only sensory
4. Central nervous system
Reflex is:
1. Slow reaction
2. Conscious decision
3. Automatic response ✓
4. Learned behavior
Skeletal system functions include:
1. Only support
2. Only movement
3. Digestion
4. Support, protection, movement ✓
How many bones in adult human?
1. 500
2. 300
3. 206 ✓
4. 100
Ligaments connect:
1. Bone to bone ✓
2. Nerve to brain
3. Organs together
4. Muscle to bone
Tendons connect:
1. Organs together
2. Nerve to muscle
3. Bone to bone
4. Muscle to bone ✓
Skeletal muscle is:
1. Voluntary ✓
2. Involuntary
3. Only in heart
4. Not controlled
Cardiac muscle is:
1. Attached to bones
2. In all organs
3. Only in heart, involuntary ✓
4. Voluntary
Smooth muscle is:
1. Only in heart
2. Voluntary
3. Attached to bones
4. Involuntary, in organs ✓
Muscles work in:
1. Random patterns
2. Antagonistic pairs ✓
3. Isolation
4. Groups of ten
Homeostasis is:
1. Maintaining stable internal conditions ✓
2. Only temperature
3. Growth process
4. Change in environment
Kidneys function:
1. Filter blood, produce urine ✓
2. Store bile
3. Produce hormones only
4. Digest food
Endocrine system uses:
1. Electrical signals only
2. Bones
3. Muscles
4. Hormones ✓
📖 science_quiz6_6_dna_genes_heredity
DNA stands for:
1. Double Nitrogen Acid
2. Dynamic Nucleotide Array
3. Deoxyribonucleic Acid ✓
4. Dual Nuclear Acid
DNA structure is:
1. Triple helix
2. Double helix ✓
3. Square
4. Single strand
DNA base pairing rule:
1. A pairs with G
2. A pairs with T, G pairs with C ✓
3. T pairs with G
4. Random pairing
Gene is:
1. Type of protein
2. Type of cell
3. Entire chromosome
4. DNA section coding for trait ✓
Alleles are:
1. Identical genes
2. Types of chromosomes
3. Different versions of same gene ✓
4. Proteins
Genotype is:
1. Genetic makeup (letters) ✓
2. Protein structure
3. Type of organism
4. Physical appearance
Phenotype is:
1. Observable trait ✓
2. DNA sequence
3. Chromosome number
4. Genetic makeup
Dominant allele:
1. Same as recessive
2. Only expressed with two copies ✓
3. Expressed when present
4. Never expressed
Recessive allele:
1. Always expressed
2. Expressed with one copy
3. Needs two copies to be expressed ✓
4. Never expressed
Homozygous means:
1. Two different alleles
2. One allele only
3. No alleles
4. Two identical alleles ✓
Heterozygous means:
1. No alleles
2. Two different alleles ✓
3. One allele only
4. Two identical alleles
Punnett square is used to:
1. Observe cells
2. Count chromosomes
3. Predict offspring genotypes ✓
4. Measure DNA
Cross Rr × Rr produces ratio:
1. 1:1
2. All recessive
3. 3 dominant : 1 recessive phenotype ✓
4. All dominant
Cross RR × rr produces:
1. 1:1 ratio
2. All RR
3. All Rr (heterozygous) ✓
4. All rr
Mutation is:
1. Cell division
2. Normal DNA replication
3. Type of protein
4. Change in DNA sequence ✓
Most mutations are:
1. Always neutral
2. Always harmful
3. Harmful or neutral ✓
4. Always beneficial
Mutations can be caused by:
1. Errors in replication or environmental factors ✓
2. Eating food
3. Only inheritance
4. Normal cell function
Sex-linked traits are:
1. Only in males
2. Not inherited
3. On all chromosomes equally
4. On X or Y chromosome ✓
Males have chromosomes:
1. XY ✓
2. YY
3. XO
4. XX
Females have chromosomes:
1. XY
2. YY
3. XO
4. XX ✓
X-linked recessive traits more common in:
1. Both equally
2. Males ✓
3. Neither
4. Females
Incomplete dominance produces:
1. Dominant phenotype only
2. Blended phenotype in heterozygote ✓
3. Recessive phenotype only
4. Both phenotypes separately
Codominance shows:
1. Both alleles fully expressed ✓
2. One dominates
3. Blended phenotype
4. No expression
DNA replication is:
1. Semi-conservative (one old, one new strand) ✓
2. Random process
3. Doesn't occur
4. Creates entirely new DNA
Genetic variation important for:
1. Nothing
2. Preventing reproduction
3. Harming organisms
4. Evolution and adaptation ✓
📖 science_quiz6_5_cell_division
Cells divide for:
1. Only growth
2. Only reproduction
3. Growth, repair, reproduction ✓
4. No reason
Cell cycle consists of:
1. Only cytokinesis
2. Interphase and M phase ✓
3. Three equal parts
4. Only mitosis
DNA replication occurs in:
1. G₁ phase
2. S phase ✓
3. Mitosis
4. Cytokinesis
Mitosis produces:
1. One large cell
2. Four different cells
3. No cells
4. Two identical daughter cells ✓
Stages of mitosis in order:
1. PMAT reversed
2. Random order
3. Prophase, Metaphase, Anaphase, Telophase ✓
4. Only two stages
In prophase:
1. Chromosomes condense, become visible ✓
2. Chromatids separate
3. Chromosomes line up
4. Nuclear membrane reforms
In metaphase:
1. Chromosomes line up at equator ✓
2. Cytokinesis occurs
3. Chromosomes condense
4. Chromatids separate
In anaphase:
1. Nuclear membrane breaks
2. Sister chromatids separate ✓
3. Chromosomes line up
4. Chromosomes condense
In telophase:
1. Chromosomes line up
2. Chromatids separate
3. Nuclear membranes reform ✓
4. DNA replicates
Cytokinesis is:
1. Division of nucleus
2. Chromosome condensation
3. DNA replication
4. Division of cytoplasm ✓
Animal cell cytokinesis:
1. Wall builds outward
2. Cleavage furrow pinches inward ✓
3. Cell plate forms
4. No division occurs
Plant cell cytokinesis:
1. Pinching inward
2. Cleavage furrow
3. Cell plate forms outward ✓
4. No division
Sister chromatids are:
1. Identical copies of chromosome ✓
2. Types of proteins
3. Parts of nucleus
4. Different chromosomes
Centromere is:
1. Part of nucleus
2. Spindle fiber
3. Where sister chromatids join ✓
4. End of chromosome
Human cells have:
1. 92 chromosomes
2. 100 chromosomes
3. 23 chromosomes
4. 46 chromosomes ✓
After mitosis, each daughter cell has:
1. No chromosomes
2. Double the chromosomes
3. Same number of chromosomes as parent ✓
4. Half the chromosomes
Checkpoints in cell cycle:
1. Prevent errors, ensure proper division ✓
2. Speed up division
3. Have no function
4. Only in cancer
Cancer is:
1. Cell death
2. Normal division
3. Controlled growth
4. Uncontrolled cell division ✓
Cancer cells:
1. Ignore stop signals ✓
2. Never divide
3. Follow all signals
4. Always die quickly
Benign tumor:
1. Spreads to other tissues
2. Always fatal
3. Not a tumor
4. Stays in one place ✓
Malignant tumor:
1. Not cancerous
2. Cancerous, can spread ✓
3. Stays in place
4. Harmless
Metastasis means:
1. Cell division stops
2. Cancer spreads to other tissues ✓
3. Cancer cured
4. Tumor shrinks
Carcinogens are:
1. Cancer-causing agents ✓
2. Vitamins
3. Cancer treatments
4. Normal cells
Why do organisms stay small-celled?
1. Maintain efficient SA:V ratio ✓
2. Random
3. Look better
4. Cannot divide large cells
Interphase takes up:
1. 50% of cycle
2. 0% of cycle
3. ~10% of cycle
4. ~90% of cell cycle ✓
📖 science_quiz6_4_cellular_respiration
Cellular respiration breaks down:
1. ATP to make glucose
2. Proteins into amino acids
3. Glucose to release ATP ✓
4. Water into oxygen
Cellular respiration equation reactants:
1. CO₂ + H₂O
2. Glucose + O₂ ✓
3. ATP + glucose
4. Light + water
Cellular respiration equation products:
1. Glucose + O₂
2. CO₂ + H₂O + ATP ✓
3. Only CO₂
4. Only ATP
Cellular respiration occurs in:
1. Only bacteria
2. Only animal cells
3. Only plant cells
4. All living cells ✓
Most ATP produced in:
1. Chloroplasts
2. Cytoplasm
3. Mitochondria ✓
4. Nucleus
ATP stands for:
1. Adenosine Triphosphate ✓
2. Adenine Triple Protein
3. Atomic Transfer Process
4. Active Transport Pump
ATP releases energy by:
1. Breaking phosphate bond ✓
2. Adding phosphates
3. Combining with glucose
4. Destroying adenine
Aerobic respiration requires:
1. Only water
2. Oxygen ✓
3. Only CO₂
4. No oxygen
Aerobic respiration produces:
1. ~36-38 ATP per glucose
2. 0 ATP
3. 2 ATP per glucose ✓
4. 100 ATP
Anaerobic respiration produces:
1. 100 ATP
2. 36-38 ATP
3. No ATP
4. 2 ATP per glucose ✓
Glycolysis occurs in:
1. Nucleus
2. Cytoplasm ✓
3. Mitochondria
4. Chloroplast
Glycolysis produces net:
1. 4 ATP
2. 36 ATP
3. 2 ATP ✓
4. 0 ATP
Krebs cycle occurs in:
1. Mitochondrial matrix ✓
2. Thylakoids
3. Cytoplasm
4. Nucleus
Electron transport chain occurs in:
1. Nucleus
2. Outer membrane
3. Inner mitochondrial membrane ✓
4. Cytoplasm
Oxygen's role in respiration:
1. Produces glucose
2. Initial reactant in glycolysis
3. Not involved
4. Final electron acceptor ✓
Lactic acid fermentation occurs:
1. Only in yeast
2. Only in plants
3. In muscles during intense exercise ✓
4. In mitochondria always
Alcoholic fermentation produces:
1. Ethanol + CO₂ ✓
2. Only ATP
3. Glucose
4. Lactic acid
Alcoholic fermentation used in:
1. Photosynthesis
2. Energy production in humans
3. Medicine only
4. Brewing and baking ✓
Lactic acid buildup causes:
1. Muscle fatigue and soreness ✓
2. No effects
3. Faster running
4. Increased energy
Oxygen debt means:
1. Debt to pay
2. No oxygen available
3. Too much oxygen
4. Extra O₂ needed after exercise ✓
Cellular respiration is:
1. Unrelated to photosynthesis
2. Opposite of photosynthesis ✓
3. Same as photosynthesis
4. Only in animals
Why do we breathe?
1. Remove water
2. Get O₂ for respiration, remove CO₂ ✓
3. Only to talk
4. Get glucose
During rest:
1. Aerobic respiration sufficient ✓
2. No respiration
3. Only glycolysis
4. Always anaerobic
During intense exercise:
1. Switch to anaerobic fermentation ✓
2. Aerobic increases enough
3. Stop respiration
4. No energy needed
Efficiency of cellular respiration:
1. 0%
2. 100%
3. 10%
4. ~38-40% ✓
📖 science_quiz6_3_photosynthesis
Photosynthesis converts:
1. ATP to glucose
2. Chemical to light
3. Light energy to chemical energy ✓
4. Heat to light
Photosynthesis equation reactants:
1. CO₂ + O₂
2. CO₂ + H₂O + light ✓
3. ATP + H₂O
4. Glucose + O₂
Photosynthesis equation products:
1. ATP only
2. Glucose + O₂ ✓
3. CO₂ + H₂O
4. Water only
Photosynthesis occurs in:
1. Ribosomes
2. Nucleus
3. Mitochondria
4. Chloroplasts ✓
Chlorophyll is:
1. Colorless protein
2. Type of sugar
3. Green pigment absorbing light ✓
4. Oxygen molecule
Chlorophyll absorbs mainly:
1. Red and blue light ✓
2. Only infrared
3. Green light
4. Only UV
Light-dependent reactions occur in:
1. Thylakoid membranes ✓
2. Nucleus
3. Cytoplasm
4. Stroma
Calvin cycle occurs in:
1. Cytoplasm
2. Stroma ✓
3. Thylakoids
4. Mitochondria
Light reactions produce:
1. CO₂ and water
2. Only oxygen
3. ATP, NADPH, O₂ ✓
4. Glucose only
Calvin cycle produces:
1. Oxygen
2. Light
3. Water
4. Glucose ✓
Oxygen in photosynthesis comes from:
1. Glucose
2. Water (H₂O) ✓
3. Carbon dioxide
4. Air
Increasing light intensity:
1. Decreases rate
2. Stops photosynthesis
3. Increases rate (to a limit) ✓
4. No effect
Increasing CO₂:
1. Increases rate (to a limit) ✓
2. No effect
3. Stops photosynthesis
4. Decreases rate
Optimal temperature for most plants:
1. 0-10°C
2. 100°C
3. 25-35°C ✓
4. 50-60°C
Too high temperature:
1. Produces more glucose
2. Increases rate indefinitely
3. No effect
4. Denatures enzymes, rate drops ✓
Limiting factor is:
1. Always light
2. Temperature only
3. Factor in shortest supply ✓
4. Most abundant factor
Stomata function:
1. Gas exchange (CO₂ in, O₂ out) ✓
2. Photosynthesis
3. Protein synthesis
4. Water storage
Stomata are controlled by:
1. Root cells
2. Mitochondria
3. Chloroplasts
4. Guard cells ✓
Stomata generally open:
1. During day ✓
2. Never
3. Always equally
4. At night
Photosynthesis importance:
1. Removes water
2. Only makes oxygen
3. Only makes food
4. Produces food and oxygen ✓
C4 plants are adapted to:
1. No sunlight
2. Hot, dry conditions ✓
3. Darkness
4. Cold, wet conditions
CAM plants open stomata:
1. During day
2. At night ✓
3. Always
4. Never
Palisade mesophyll contains:
1. Many chloroplasts ✓
2. Only mitochondria
3. No chloroplasts
4. Cell walls only
Photosynthesis and respiration are:
1. Complementary processes ✓
2. Unrelated
3. Identical processes
4. Both produce glucose
Early photosynthetic organisms:
1. Removed all oxygen
2. Had no effect
3. Lived without water
4. Created oxygen atmosphere ✓
📖 science_quiz6_2_cell_processes_transport
Passive transport requires:
1. Only proteins
2. Heat energy
3. No energy ✓
4. ATP
Active transport requires:
1. Only water
2. ATP (energy) ✓
3. Sunlight
4. No energy
Diffusion is movement from:
1. Only in water
2. High to low concentration ✓
3. Low to high
4. Random directions
Osmosis is diffusion of:
1. Salt
2. Glucose
3. Protein
4. Water ✓
Cell membrane structure:
1. Single protein layer
2. Cellulose wall
3. Phospholipid bilayer ✓
4. Pure lipid
Hypertonic solution has:
1. More solute than cell ✓
2. No solute
3. Same concentration
4. Less solute than cell
In hypertonic solution, cell:
1. Shrinks (loses water) ✓
2. Stays same
3. Swells
4. Bursts
Hypotonic solution has:
1. Only solute
2. Less solute than cell ✓
3. More solute than cell
4. Same concentration
In hypotonic solution, animal cell:
1. Stays same
2. Becomes turgid without bursting
3. Swells and may burst ✓
4. Shrinks
In hypotonic solution, plant cell:
1. Bursts
2. Dies
3. Shrinks
4. Becomes turgid (firm) ✓
Isotonic solution:
1. Pure water
2. Same concentration as cell ✓
3. Less concentrated
4. More concentrated
Facilitated diffusion uses:
1. ATP energy
2. Cell wall
3. Transport proteins ✓
4. Only lipids
Channel proteins:
1. Form pores for specific substances ✓
2. Digest materials
3. Produce ATP
4. Pump substances uphill
Sodium-potassium pump:
1. Only in plants
2. Uses no energy
3. Uses ATP to pump ions ✓
4. Pumps water
Endocytosis is:
1. Expelling materials
2. Simple diffusion
3. Osmosis
4. Taking materials into cell ✓
Exocytosis is:
1. Passive diffusion
2. Taking in materials
3. Expelling materials from cell ✓
4. Osmosis
Phagocytosis is:
1. Cell eating (engulfing solid) ✓
2. Pumping ions
3. Diffusion
4. Cell drinking
Pinocytosis is:
1. Cell eating
2. Protein synthesis
3. Ion pumping
4. Cell drinking (engulfing liquid) ✓
Concentration gradient is:
1. Difference in concentration ✓
2. Temperature difference
3. Pressure difference
4. Same concentration everywhere
Equilibrium means:
1. All molecules stop moving
2. High concentration everywhere
3. No molecules present
4. Equal concentration, no net movement ✓
What increases diffusion rate?
1. Smaller surface area
2. Higher temperature ✓
3. Larger distance
4. Lower temperature
Cell membrane is selectively permeable meaning:
1. Only water passes
2. Some substances pass, others blocked ✓
3. Everything passes freely
4. Nothing can pass
Small nonpolar molecules diffuse:
1. Easily through membrane ✓
2. Not at all
3. Only with ATP
4. Only through proteins
Large polar molecules:
1. Need protein help to cross ✓
2. Cross easily
3. Only cross in plants
4. Never cross
Why use active transport?
1. For passive movement
2. To destroy molecules
3. Save energy
4. Accumulate substances against gradient ✓
📖 science_quiz6_1_cell_structure
The cell is:
1. Always visible to naked eye
2. Only in animals
3. The basic unit of life ✓
4. A type of tissue
Cell theory states:
1. Only animals have cells
2. All living things made of cells ✓
3. Cells are made of organs
4. Cells don't reproduce
Cell theory states cells come from:
1. Rocks
2. Pre-existing cells ✓
3. Air
4. Spontaneous generation
Prokaryotic cells:
1. Are only in plants
2. Have a nucleus
3. Are the largest cells
4. Lack a nucleus ✓
Eukaryotic cells:
1. Are only bacteria
2. Lack a nucleus
3. Have a nucleus ✓
4. Have no organelles
Which is larger?
1. Eukaryotic cells ✓
2. Both same size
3. Prokaryotic cells
4. Viruses
Examples of prokaryotes:
1. Bacteria ✓
2. Fungi
3. Animals
4. Plants
The nucleus contains:
1. Only proteins
2. DNA ✓
3. Only RNA
4. Digestive enzymes
Mitochondria are:
1. Storage organelles
2. Protein factories
3. Powerhouses producing ATP ✓
4. DNA containers
Chloroplasts are found in:
1. Animal cells
2. Bacterial cells
3. All cells
4. Plant cells ✓
Cell wall is found in:
1. Animal cells
2. Plant cells ✓
3. All eukaryotes
4. No cells
Cell wall is made of:
1. Lipids
2. Protein
3. Cellulose ✓
4. DNA
Large central vacuole is found in:
1. Plant cells ✓
2. All cells equally
3. Animal cells
4. Bacteria
Ribosomes function to:
1. Digest materials
2. Produce ATP
3. Synthesize proteins ✓
4. Store water
The cell membrane is:
1. Completely impermeable
2. Only in plants
3. Made of cellulose
4. Selectively permeable ✓
Lysosomes contain:
1. Ribosomes
2. Chlorophyll
3. Digestive enzymes ✓
4. DNA
Endoplasmic reticulum functions in:
1. Protein and lipid synthesis ✓
2. ATP production
3. Cell division only
4. Photosynthesis
Golgi apparatus:
1. Stores DNA
2. Makes proteins
3. Produces ATP
4. Packages and ships proteins ✓
Centrioles are found in:
1. Animal cells ✓
2. All prokaryotes
3. Plant cells
4. Bacteria
Organization levels from smallest:
1. Organelles → atoms → cells
2. Cells → atoms → organs
3. Organs → cells → atoms
4. Atoms → molecules → organelles → cells ✓
Why do cells stay small?
1. They look better small
2. Maintain efficient surface area to volume ratio ✓
3. Random chance
4. Cannot grow larger
Tissues are:
1. Individual cells
2. Groups of similar cells working together ✓
3. Organs
4. Organisms
Organs are made of:
1. Different tissues working together ✓
2. One type of tissue only
3. Individual cells
4. Atoms
Who first observed cells?
1. Robert Hooke ✓
2. Albert Einstein
3. Charles Darwin
4. Isaac Newton
Light microscope can magnify up to:
1. ~1,000,000×
2. ~100,000×
3. ~10×
4. ~1000× ✓
📖 science_quiz5_8_waves
Wave transfers:
1. Matter
2. Magnetism
3. Energy without transferring matter ✓
4. Temperature
Mechanical waves need:
1. No medium (vacuum)
2. A medium to travel through ✓
3. Only electric field
4. Only magnetic field
Electromagnetic waves:
1. Need water to travel
2. Don't need a medium ✓
3. Need air to travel
4. Cannot travel
In transverse wave, oscillation is:
1. Circular
2. Random
3. Parallel to wave direction
4. Perpendicular to wave direction ✓
In longitudinal wave, oscillation is:
1. Perpendicular to wave direction
2. No oscillation
3. Parallel to wave direction ✓
4. Random
Sound waves are:
1. Longitudinal ✓
2. Transverse
3. Electromagnetic
4. Don't exist
Light waves are:
1. Transverse electromagnetic ✓
2. Stationary
3. Longitudinal mechanical
4. Circular
Wavelength (λ) is:
1. Time for one wave
2. Distance between consecutive crests ✓
3. Height of wave
4. Speed of wave
Amplitude is:
1. Speed of wave
2. Distance between crests
3. Maximum displacement from equilibrium ✓
4. Number of waves per second
Frequency (f) is:
1. Height of wave
2. Distance between waves
3. Speed of wave
4. Number of waves per second ✓
Unit of frequency is:
1. Meter (m)
2. Meter per second (m/s)
3. Hertz (Hz) ✓
4. Second (s)
Period (T) is:
1. Distance between waves
2. Wave speed
3. Time for one complete wave ✓
4. Number of waves
Relationship between frequency and period:
1. f = 1/T ✓
2. f = 2T
3. f = T²
4. f = T
Wave equation is:
1. v = f - λ
2. v = f/λ
3. v = fλ ✓
4. v = f + λ
Wave with f=100Hz, λ=2m has speed:
1. 98 m/s
2. 102 m/s
3. 50 m/s
4. 200 m/s ✓
Reflection is when wave:
1. Bends entering new medium
2. Bounces off surface ✓
3. Combines with another wave
4. Spreads around obstacle
Refraction is when wave:
1. Bends entering different medium ✓
2. Bounces off surface
3. Spreads around obstacle
4. Stops completely
Diffraction is when wave:
1. Bounces off surface
2. Changes speed in new medium
3. Stops at barrier
4. Spreads around obstacles or through openings ✓
Constructive interference:
1. Waves add (louder/brighter) ✓
2. Waves cancel (silent/dark)
3. Waves don't interact
4. One wave stops
Destructive interference:
1. Waves add
2. Waves reflect
3. Waves don't interact
4. Waves cancel (quieter/dimmer) ✓
Sound cannot travel through:
1. Air
2. Vacuum ✓
3. Solids
4. Water
Speed of sound in air (~20°C):
1. ~3×10⁸ m/s
2. ~343 m/s ✓
3. ~1500 m/s
4. ~5000 m/s
Pitch of sound related to:
1. Frequency ✓
2. Amplitude
3. Wavelength only
4. Speed
Loudness related to:
1. Amplitude ✓
2. Wavelength only
3. Frequency
4. Speed
Electromagnetic spectrum from longest to shortest wavelength:
1. Gamma, X-ray, UV, Visible, IR, Microwave, Radio
2. Visible, IR, UV, X-ray, Gamma, Radio, Microwave
3. Random order
4. Radio, Microwave, IR, Visible, UV, X-ray, Gamma ✓
📖 science_quiz5_7_electromagnetic_induction
Electromagnetic induction is:
1. Static magnetism
2. Magnetism from electricity
3. Producing voltage with changing magnetic field ✓
4. Current creating magnetic field
Who discovered electromagnetic induction?
1. Georg Ohm
2. Michael Faraday ✓
3. Isaac Newton
4. Hans Ørsted
For induction to occur, magnetic field must:
1. Be static
2. Change (move or vary) ✓
3. Be very weak
4. Be permanent only
Faster change in magnetic field produces:
1. Constant voltage
2. No voltage
3. Lower voltage
4. Higher induced voltage ✓
Faraday's Law states:
1. Voltage = current × resistance
2. Charge is conserved
3. Induced voltage ∝ rate of field change ✓
4. Force = mass × acceleration
More turns in coil:
1. Increases induced voltage ✓
2. Decreases voltage
3. Reverses polarity
4. No effect on voltage
Lenz's Law states:
1. Induced current opposes the change that caused it ✓
2. Voltage increases indefinitely
3. Current is always same direction
4. Induced current helps the change
Lenz's Law ensures:
1. Magnetism is stronger
2. Conservation of energy ✓
3. Current flows faster
4. Voltage is higher
Dropping magnet through copper tube:
1. Doesn't fall
2. Falls at normal speed
3. Falls slowly (eddy currents create drag) ✓
4. Falls faster
AC generator produces:
1. No current
2. Direct current only
3. Static charge
4. Alternating current ✓
AC generator uses:
1. Battery
2. Slip rings for continuous connection ✓
3. Commutator
4. No connection
DC generator uses:
1. No switching device
2. Capacitors only
3. Commutator to produce pulsating DC ✓
4. Slip rings
Power station generator:
1. Rotates coil in magnetic field ✓
2. Uses static magnets only
3. Produces no power
4. Requires no rotation
Transformer changes:
1. Power amount
2. DC voltage
3. AC voltage up or down ✓
4. Current to voltage
Transformer cannot work with:
1. Any voltage
2. Any current
3. AC
4. DC (needs changing field) ✓
Transformer has:
1. One coil only
2. No coils
3. Primary and secondary coils on iron core ✓
4. Air core only
Transformer equation:
1. Vs/Vp = Ns/Np ✓
2. Vs + Vp = 0
3. Vs × Vp = constant
4. Vs = Vp always
Step-up transformer:
1. Ns < Np, decreases voltage
2. No turns needed
3. Ns = Np
4. Ns > Np, increases voltage ✓
Step-down transformer:
1. Ns < Np, decreases voltage ✓
2. Ns > Np, increases voltage
3. Ns = Np
4. Cannot decrease voltage
Transformer with 1000 primary turns, 100 secondary, 240V in:
1. 2.4 V out
2. 240 V out
3. 2400 V out
4. 24 V out (step-down) ✓
Ideal transformer conserves:
1. Resistance
2. Power (Pin = Pout) ✓
3. Voltage
4. Current
Power transmission uses high voltage to:
1. Make more power
2. Reduce current and power loss ✓
3. Increase current
4. Slow electrons
Induction cooktop works by:
1. Induced currents heat metal pan ✓
2. Microwave radiation
3. Direct heating element
4. Open flame
Wireless charging uses:
1. Electromagnetic induction ✓
2. Direct contact
3. Radio waves only
4. Laser
Eddy currents are:
1. Static charges
2. Straight-line currents
3. Magnetic fields
4. Circular currents induced in conductors ✓
📖 science_quiz5_6_electromagnets_motors
Electromagnet is:
1. Permanent magnet
2. Natural magnet
3. Temporary magnet created by electric current ✓
4. Magnet that produces electricity
Who discovered magnetic effect of current?
1. Faraday
2. Ørsted ✓
3. Ohm
4. Ampere
Electromagnet strength increases with:
1. Fewer turns
2. More current, more turns, iron core ✓
3. Air core only
4. Less current
Iron core in electromagnet:
1. Decreases field strength
2. Prevents magnetism
3. Has no effect
4. Greatly increases field strength ✓
Advantage of electromagnet over permanent magnet:
1. Cheaper
2. Lighter
3. Can turn on/off and adjust strength ✓
4. Always magnetic
Solenoid is:
1. Coil of wire that acts like bar magnet when current flows ✓
2. Capacitor
3. Resistor
4. Type of battery
Electromagnetic relay is:
1. Switch controlled by electromagnet ✓
2. Power source
3. Type of generator
4. Resistor
Electromagnetic crane uses:
1. Permanent magnet
2. Strong electromagnet to lift metal ✓
3. Air pressure
4. Hooks and chains only
Electric bell works by:
1. Spring mechanism only
2. Permanent magnet
3. Electromagnet repeatedly attracting armature ✓
4. Air vibration
Electric motor converts:
1. Mechanical to electrical
2. Heat to electricity
3. Light to motion
4. Electrical energy to mechanical ✓
Force on current-carrying wire in magnetic field:
1. No force
2. Perpendicular to both current and field ✓
3. Parallel to current
4. Parallel to field
Fleming's Left-Hand Rule predicts:
1. Field direction only
2. Voltage
3. Force direction on current in field ✓
4. Current direction
Motor needs commutator to:
1. Reverse current every half turn ✓
2. Cool motor
3. Increase voltage
4. Reduce friction
To make motor spin faster:
1. Decrease current
2. Weaker magnets
3. Increase current or stronger magnets ✓
4. Add resistance
DC motor uses:
1. Slip rings only
2. No switching
3. AC only
4. Commutator to switch current ✓
AC motor doesn't need commutator because:
1. AC is faster
2. AC needs no switching
3. AC current reverses itself ✓
4. AC is stronger
Generator converts:
1. Mechanical energy to electrical ✓
2. Heat to electricity
3. Chemical to electrical
4. Electrical to mechanical
Motor and generator are:
1. Completely different
2. Motors can't be generators
3. Generators can't be motors
4. Same device, opposite operations ✓
Regenerative braking:
1. Motor acts as generator to slow vehicle ✓
2. Doesn't exist
3. Wastes energy
4. Uses friction only
Maglev train uses:
1. Friction
2. Air pressure
3. Permanent magnets only
4. Electromagnets for levitation ✓
MRI machine uses:
1. No magnets
2. Very strong electromagnets ✓
3. Permanent magnets
4. Weak electromagnets
Circuit breaker uses electromagnet to:
1. Generate electricity
2. Open circuit when current too high ✓
3. Increase voltage
4. Reduce resistance
Advantages of electric motors:
1. Efficient, controllable, clean ✓
2. Cannot reverse
3. Loud, smoky
4. Need fuel constantly
Electric motor in hard drive:
1. Spins disk at high speed ✓
2. Cools disk
3. Stores data
4. Moves read/write head
Right-hand grip rule for solenoid:
1. No relation to poles
2. Only for permanent magnets
3. Thumb shows current direction
4. Fingers curl with current, thumb = N pole ✓
📖 science_quiz5_5_magnetism
Magnetism is:
1. Form of heat
2. Type of electricity
3. Force that can attract/repel without contact ✓
4. Chemical reaction
Every magnet has:
1. One pole only
2. Two poles (N and S) ✓
3. No poles
4. Three poles
If you cut a magnet in half:
1. Destroy magnetism
2. Get two magnets, each with N and S ✓
3. Get isolated N and S poles
4. Get only N poles
Like magnetic poles:
1. Have no effect
2. Attract each other
3. Cancel each other
4. Repel each other ✓
Unlike magnetic poles:
1. Cancel completely
2. Have no effect
3. Attract each other ✓
4. Repel each other
Magnetic field is:
1. Region where magnetic force acts ✓
2. Heat energy
3. Physical substance
4. Type of electric current
Magnetic field lines go from:
1. North to South (outside magnet) ✓
2. South to North
3. Random directions
4. Center outward
Where is magnetic field strongest?
1. Far from magnet
2. At the poles ✓
3. Everywhere equal
4. In the middle
Magnetic field lines:
1. Sometimes cross
2. Always cross
3. Never cross each other ✓
4. Often cross
Iron filings show magnetic field because:
1. Filings contain electricity
2. Filings are naturally magnetic
3. Filings are heavy
4. Each filing becomes temporary magnet ✓
Which is ferromagnetic material?
1. Copper
2. Iron ✓
3. Plastic
4. Wood
Magnetic domains are:
1. Large magnetic fields
2. Holes in materials
3. Small regions with aligned atomic magnets ✓
4. Electric charges
In unmagnetized iron:
1. Domains repel each other ✓
2. No domains present
3. All domains aligned
4. Domains are randomly oriented
In magnetized iron:
1. Domains are random
2. Domains reverse
3. Domains are aligned in same direction ✓
4. Domains disappear
Induced magnetism means:
1. Magnetism destroyed
2. Permanent magnetism created
3. Magnetism reversed
4. Temporary magnetism in iron near magnet ✓
To make permanent magnet:
1. Cool it rapidly
2. Just expose to magnet briefly
3. Align domains (stroke, heat in field, or current) ✓
4. Hit it randomly
To demagnetize:
1. Heat above Curie temp, hammer, or AC ✓
2. Polish surface
3. Cool it
4. Expose to another magnet
Curie temperature is when:
1. Material freezes
2. Material melts
3. Material becomes magnetic
4. Material loses magnetism ✓
Earth's magnetic field is caused by:
1. Molten iron in core ✓
2. Magnetic poles
3. Iron surface rocks
4. Sun's magnetism
Earth's magnetic north pole is:
1. Moves randomly
2. Near geographic north
3. At equator
4. Near geographic south (attracts compass N) ✓
Compass works because:
1. Needle is electric
2. Needle aligns with Earth's magnetic field ✓
3. Needle points to sun
4. Needle has gravity
Earth's magnetic field protects us from:
1. Gravity
2. Solar wind (charged particles) ✓
3. Sound waves
4. Visible light
Auroras (Northern Lights) are caused by:
1. Charged particles from sun interacting with field ✓
2. Earth's rotation
3. Volcanic activity
4. Moon's gravity
Animals that navigate using magnetism include:
1. Birds, turtles, salmon ✓
2. No animals
3. Only fish
4. Only insects
Magnetic field cannot be:
1. Measured
2. Detected
3. Used
4. Seen directly (but effects can) ✓
📖 science_quiz5_4_series_parallel_circuits
In series circuit, components are connected:
1. Across common points
2. In grid pattern
3. End-to-end in single path ✓
4. Randomly
In series circuit, current is:
1. Zero
2. Same through all components ✓
3. Different through each
4. Infinite
In series circuit, voltage:
1. Is zero
2. Divides among components ✓
3. Adds up
4. Same across all
Total resistance in series:
1. R_total = R₁ × R₂
2. R_total = R₁/R₂
3. 1/R_total = 1/R₁ + 1/R₂...
4. R_total = R₁ + R₂ + R₃... ✓
Three 10 Ω resistors in series, total resistance:
1. 3.33 Ω
2. 100 Ω
3. 30 Ω ✓
4. 10 Ω
In series circuit, if one component fails:
1. Entire circuit stops ✓
2. Others continue working
3. Current increases
4. Voltage increases
In parallel circuit, components are connected:
1. Across common points ✓
2. End-to-end
3. Randomly
4. In single line
In parallel circuit, voltage is:
1. Different across each
2. Same across all components ✓
3. Zero
4. Divides
In parallel circuit, current:
1. Divides among branches
2. Zero
3. Same in all branches ✓
4. Infinite
Total resistance in parallel:
1. R_total = R₁ + R₂ + R₃...
2. R_total = R₁ - R₂
3. R_total = R₁ × R₂
4. 1/R_total = 1/R₁ + 1/R₂... ✓
Three identical 30 Ω resistors in parallel, total:
1. 30 Ω
2. 10 Ω ✓
3. 90 Ω
4. 3.33 Ω
In parallel circuit, total resistance is:
1. Equal to average
2. Greater than largest
3. Less than smallest individual ✓
4. Equal to sum
In parallel circuit, if one component fails:
1. Others continue working ✓
2. Entire circuit stops
3. Current stops
4. Voltage drops to zero
Home electrical wiring uses:
1. No circuits
2. Open circuits
3. Parallel circuits ✓
4. Series circuits
Old Christmas lights (series) problem:
1. Each works independently
2. Voltage varies
3. Current increases
4. One bulb out → all go out ✓
Modern Christmas lights (parallel) advantage:
1. Uses less power
2. Cheaper to make
3. One bulb out → rest stay lit ✓
4. Brighter lights
Two resistors (6Ω and 3Ω) in series, total:
1. 9 Ω ✓
2. 2 Ω
3. 18 Ω
4. 0.5 Ω
Two resistors (6Ω and 3Ω) in parallel, total:
1. 18 Ω
2. 4.5 Ω
3. 9 Ω
4. 2 Ω ✓
Series: 24V battery, R₁=6Ω, R₂=10Ω. Current is:
1. 1.5 A ✓
2. 16 A
3. 2.4 A
4. 4 A
From previous: voltage across R₂ (10Ω) is:
1. 9 V
2. 24 V
3. 10 V
4. 15 V ✓
Parallel: 12V battery, R₁=6Ω, R₂=4Ω. Total current:
1. 3 A
2. 5 A ✓
3. 2 A
4. 10 A
Kirchhoff's Current Law states:
1. Power is conserved
2. Current in = Current out at junction ✓
3. Resistance is constant
4. Voltage around loop = 0
Kirchhoff's Voltage Law states:
1. Sum of voltages around loop = 0 ✓
2. Voltage is same in parallel
3. Resistance adds in series
4. Current is same in series
To analyze combination circuit:
1. Simplify parallel first, then series ✓
2. Simplify series first
3. Cannot be solved
4. Solve randomly
Advantage of parallel over series:
1. Less current
2. Lower total resistance always wanted
3. Simpler wiring
4. Independent operation of components ✓
📖 science_quiz5_3_ohms_law_circuits
Ohm's Law is:
1. V = I/R
2. V = I + R
3. V = IR ✓
4. V = R/I
If V = 12 V and R = 4 Ω, then I equals:
1. 8 A
2. 3 A ✓
3. 48 A
4. 16 A
If I = 2 A and R = 5 Ω, then V equals:
1. 3 V
2. 10 V ✓
3. 2.5 V
4. 7 V
If V = 24 V and I = 0.5 A, then R equals:
1. 12 Ω
2. 23.5 Ω
3. 24.5 Ω
4. 48 Ω ✓
If voltage doubles (R constant), current:
1. Stays same
2. Quadruples
3. Doubles ✓
4. Halves
If resistance doubles (V constant), current:
1. Halves ✓
2. Quadruples
3. Stays same
4. Doubles
A complete circuit requires:
1. Closed path for current ✓
2. Only resistor
3. Only wires
4. Only battery
Open circuit means:
1. Low resistance
2. Path is broken, no current flows ✓
3. Circuit is working
4. High current flows
Closed circuit means:
1. Path is broken
2. Circuit is damaged
3. Complete path, current can flow ✓
4. No current
Short circuit occurs when:
1. Circuit is too long
2. Voltage is too high
3. Switch is open
4. Very low resistance path bypasses load ✓
Short circuit causes:
1. Lower voltage
2. Excessive current and heat ✓
3. Circuit to open
4. No current flow
Circuit breaker protects against:
1. Open circuits
2. High resistance
3. Excessive current ✓
4. Low voltage
Ohmic materials have:
1. Constant resistance ✓
2. No resistance
3. Infinite resistance
4. Variable resistance
V-I graph for ohmic material is:
1. Horizontal line
2. Curved line
3. Straight line through origin ✓
4. Vertical line
Non-ohmic materials:
1. Have infinite resistance
2. Always obey Ohm's Law
3. Don't obey Ohm's Law
4. Have zero resistance ✓
Power can also be calculated as:
1. P = I/R²
2. P = R/I²
3. P = I²R ✓
4. P = √(IR)
Power can also be calculated as:
1. P = V²/R ✓
2. P = √(VR)
3. P = V/R²
4. P = R/V²
A 100 Ω resistor has 10 V across it. Power dissipated:
1. 100 W
2. 1000 W
3. 10 W
4. 1 W ✓
A 5 Ω resistor carries 4 A. Power dissipated:
1. 80 W ✓
2. 20 W
3. 9 W
4. 1.25 W
In circuit diagram, battery symbol shows:
1. Lines don't indicate polarity
2. Short line is positive
3. Both lines are negative
4. Long line is positive terminal ✓
Circuit symbol for resistor is:
1. Straight line
2. Zigzag or rectangle ✓
3. Circle with X
4. Triangle
Circuit symbol for lamp is:
1. Rectangle
2. Circle with X ✓
3. Diamond
4. Zigzag
A 12 V, 36 W device has resistance:
1. 4 Ω ✓
2. 3 Ω
3. 432 Ω
4. 48 Ω
For safety, never:
1. Connect ammeter in parallel across battery ✓
2. Open circuit before changing
3. Connect voltmeter in parallel
4. Use circuit breaker
Fuse works by:
1. Increasing resistance
2. Storing charge
3. Decreasing voltage
4. Melting when current too high ✓
📖 science_quiz5_2_current_voltage_resistance
Electric current is:
1. Stored electricity
2. Resistance in wires
3. Flow of electric charge ✓
4. Type of voltage
Current formula is:
1. I = V/R
2. I = Q/t ✓
3. I = P/V
4. I = FR
SI unit of current is:
1. Volt (V)
2. Ampere (A) ✓
3. Coulomb (C)
4. Ohm (Ω)
One ampere equals:
1. 1 volt per ohm
2. 1 watt per volt
3. 1 joule per coulomb
4. 1 coulomb per second ✓
If 10 C pass through a wire in 2 s, current is:
1. 12 A
2. 20 A
3. 5 A ✓
4. 8 A
Conventional current direction is:
1. Positive to negative ✓
2. Negative to positive
3. North to south
4. Random
Electrons actually flow:
1. Negative to positive ✓
2. Randomly
3. Positive to negative
4. Don't flow
Voltage is:
1. Power consumed
2. Electrical potential difference ✓
3. Opposition to current
4. Flow of charge
Voltage formula is:
1. V = Qt
2. V = IR
3. V = E/Q ✓
4. V = P/I
SI unit of voltage is:
1. Watt (W)
2. Ohm (Ω)
3. Ampere (A)
4. Volt (V) ✓
One volt equals:
1. 1 ohm per ampere
2. 1 joule per coulomb ✓
3. 1 watt per ampere
4. 1 coulomb per second
What is resistance?
1. Voltage across component
2. Flow of electrons
3. Opposition to current flow ✓
4. Power dissipated
SI unit of resistance is:
1. Ohm (Ω) ✓
2. Watt (W)
3. Volt (V)
4. Ampere (A)
Resistance increases with:
1. Thicker wire
2. Lower temperature
3. Longer wire ✓
4. Better conductor
Resistance decreases with:
1. Higher temperature (for metals)
2. Longer wire
3. Poorer conductor
4. Thicker wire ✓
Which has lowest resistance?
1. Thin, long rubber
2. Thick, short rubber
3. Thick, short copper wire ✓
4. Thin, long copper wire
Ammeter measures:
1. Current ✓
2. Power
3. Resistance
4. Voltage
Ammeter is connected:
1. To ground only
2. In parallel
3. Across component
4. In series ✓
Voltmeter measures:
1. Voltage (potential difference) ✓
2. Power
3. Current
4. Resistance
Voltmeter is connected:
1. To ground only
2. In series
3. Through component
4. In parallel (across component) ✓
Power formula is:
1. P = V + I
2. P = VI ✓
3. P = V/I
4. P = I/V
SI unit of power is:
1. Volt (V)
2. Watt (W) ✓
3. Ampere (A)
4. Joule (J)
A 12 V battery supplies 3 A. Power is:
1. 36 W ✓
2. 15 W
3. 4 W
4. 9 W
A 60 W bulb at 120 V draws current:
1. 0.5 A ✓
2. 180 A
3. 2 A
4. 7200 A
DC stands for:
1. Double Current
2. Divided Current
3. Dynamic Current
4. Direct Current ✓
📖 science_quiz5_1_static_electricity
What is electric charge?
1. A type of energy
2. The speed of electrons
3. A fundamental property causing electromagnetic force ✓
4. Mass of protons
Two types of electric charge are:
1. Fast and slow
2. Positive and negative ✓
3. North and south
4. Up and down
What is the charge on a proton?
1. Neutral (0)
2. Positive (+) ✓
3. Negative (−)
4. Variable
What is the charge on an electron?
1. Neutral (0)
2. Variable
3. Positive (+)
4. Negative (−) ✓
Like charges:
1. Attract each other
2. Have no effect
3. Repel each other ✓
4. Cancel each other
Opposite charges:
1. Attract each other ✓
2. Have no effect
3. Neutralize completely
4. Repel each other
Which particle can move easily in conductors?
1. Electrons ✓
2. Nuclei
3. Neutrons
4. Protons
An object becomes positively charged when it:
1. Gains electrons
2. Loses electrons ✓
3. Gains protons
4. Loses protons
An object becomes negatively charged when it:
1. Loses electrons
2. Gains protons
3. Gains electrons ✓
4. Loses protons
Charging by rubbing (friction) involves:
1. Destruction of charges
2. Transfer of protons
3. Creation of new charges
4. Transfer of electrons between materials ✓
What is a conductor?
1. Uncharged material
2. Material allowing charge to flow easily ✓
3. Material with no charge
4. Material preventing charge flow
Which is a good conductor?
1. Rubber
2. Plastic
3. Copper ✓
4. Glass
What is an insulator?
1. Material resisting charge flow ✓
2. Material with negative charge only
3. Material allowing charge flow
4. Material with positive charge only
Which is a good insulator?
1. Aluminum
2. Copper
3. Rubber ✓
4. Silver
Why do we get shocked touching doorknob after walking on carpet?
1. Doorknob creates electricity
2. Carpet charges the doorknob
3. Shoes conduct too well
4. Static charge buildup discharges through us ✓
Coulomb's Law describes:
1. Voltage in circuits
2. Resistance of materials
3. Force between electric charges ✓
4. Electric current flow
If distance between two charges doubles, force becomes:
1. 1/4 of original ✓
2. 2× original
3. 4× original
4. 1/2 of original
Electroscope is used to:
1. Store electricity
2. Measure current
3. Measure voltage
4. Detect presence of electric charge ✓
Lightning is caused by:
1. Large static charge buildup in clouds ✓
2. Magnetic fields
3. Chemical reactions
4. Extreme heat
Van de Graaff generator:
1. Converts AC to DC
2. Measures electric current
3. Powers motors
4. Produces very high static voltage ✓
Why do fuel trucks have grounding chains?
1. Increase fuel efficiency
2. Prevent static spark igniting fuel ✓
3. Improve braking
4. Reduce tire wear
Charged objects can attract neutral objects because:
1. All objects have hidden charge
2. Induce opposite charge on near side of neutral ✓
3. Neutral objects are actually positive
4. Magnetic force acts
Which cannot be isolated?
1. Single electric charge ✓
2. Proton
3. Single magnetic pole
4. Electron
Elementary charge (e) equals:
1. 1.6 × 10⁻¹⁹ C ✓
2. 1.6 × 10⁻²⁰ C
3. 9 × 10⁹ C
4. 1.6 × 10⁻¹⁸ C
SI unit of electric charge is:
1. Ampere (A)
2. Volt (V)
3. Ohm (Ω)
4. Coulomb (C) ✓
📖 science_quiz4_8_forces_real_world
Four forces on flying airplane at constant speed are:
1. Lift<Weight, Thrust<Drag
2. Lift>Weight, Thrust>Drag
3. Lift=Weight, Thrust=Drag ✓
4. All four equal
Airplane accelerates forward when:
1. Thrust = Drag
2. Thrust > Drag ✓
3. Lift > Weight only
4. Thrust < Drag
Airplane climbs when:
1. Thrust > Drag only
2. Lift > Weight ✓
3. Lift < Weight
4. Lift = Weight
Crumple zones in cars work by:
1. Making car heavier
2. Increasing collision force
3. Stopping car instantly
4. Extending collision time ✓
Airbags reduce injury by:
1. Stopping motion instantly
2. Increasing force
3. Increasing stopping time ✓
4. Decreasing stopping time
Anti-lock brakes (ABS) prevent:
1. Wheel lockup, maintaining steering ✓
2. Car from moving
3. Acceleration
4. Tire wear
Car's stopping distance is proportional to:
1. Speed squared ✓
2. Speed
3. Mass
4. Mass squared
If car speed doubles, stopping distance:
1. Doubles (2×)
2. Quadruples (4×) ✓
3. Stays same
4. Halves
Sprinters use starting blocks to:
1. Stretch muscles
2. Prevent slipping only
3. Push hard backward, getting strong forward reaction ✓
4. Look professional
Follow-through in baseball hitting:
1. Prevents bat from breaking
2. Reduces force
3. Looks good only
4. Extends contact time, increases impulse on ball ✓
Pulling glove back when catching ball:
1. Looks professional
2. Increases stop time, reduces force on hand ✓
3. Increases force
4. Stops ball faster
Bending knees when landing from jump:
1. Looks better
2. Has no physical effect
3. Extends landing time, reduces force ✓
4. Increases force
Rocket works in space because:
1. Expels mass, doesn't need air ✓
2. Pushes against stars
3. Uses special fuel
4. Pushes against air
As rocket fuel burns, rocket accelerates more because:
1. Force increases
2. Gravity decreases
3. Mass decreases (a = F/m) ✓
4. Air resistance decreases
Orbit is best described as:
1. Moving very fast upward
2. Being beyond gravity
3. Floating in space
4. Continuous free fall while moving forward ✓
Satellites stay in orbit because:
1. They're beyond atmosphere only
2. They're falling and moving forward fast enough
3. Rockets keep pushing them ✓
4. There's no gravity there
Suspension bridge cables experience:
1. Tension force ✓
2. No force
3. Shear force
4. Compression force
Building columns experience:
1. No force
2. Tension force
3. Only shear
4. Compression force ✓
Triangulation in structures is strong because:
1. Triangles are rigid shapes ✓
2. Triangles are cheap
3. Triangles are light
4. Triangles look good
Why do large trucks take longer to stop?
1. Drivers react slowly
2. They're always faster
3. Brakes are worse
4. More mass = more momentum to change ✓
Ice skates work by:
1. Ice is slippery naturally always
2. High pressure on small blade area melts thin ice layer ✓
3. Skates are cold
4. They're sharp only
Hydraulic car jack multiplies force by:
1. Using levers
2. Using different piston areas (Pascal's Principle) ✓
3. Using wheels
4. Magic
Car brakes convert kinetic energy to:
1. Thermal energy (heat) ✓
2. Potential energy
3. Electrical energy
4. Chemical energy
Why does same engine force make sports car accelerate faster than truck?
1. Sports car has less mass ✓
2. Sports car has better tires only
3. Truck has more friction
4. Sports car has more force
Streamlined shapes reduce:
1. Engine force
2. Weight
3. Friction with ground
4. Air resistance ✓
📖 science_quiz4_7_motion_graphs
On distance-time graph, horizontal line means:
1. Accelerating
2. Constant speed
3. Object is stationary ✓
4. Decelerating
On distance-time graph, straight diagonal line means:
1. Deceleration
2. Constant speed ✓
3. Acceleration
4. At rest
On distance-time graph, curve getting steeper means:
1. Stationary
2. Speeding up (accelerating) ✓
3. Constant speed
4. Slowing down
On distance-time graph, curve getting flatter means:
1. Constant speed
2. Stationary
3. Speeding up
4. Slowing down (decelerating) ✓
Slope of distance-time graph represents:
1. Acceleration
2. Mass
3. Speed ✓
4. Force
Distance-time graph from (0,0) to (10,50). Speed is:
1. 5 m/s ✓
2. 50 m/s
3. 10 m/s
4. 500 m/s
On velocity-time graph, horizontal line means:
1. Constant velocity ✓
2. At rest
3. Accelerating
4. Changing direction
On velocity-time graph, line on time axis (v=0) means:
1. Maximum speed
2. Stationary ✓
3. Constant velocity
4. Accelerating
On velocity-time graph, sloping up line means:
1. Decelerating
2. At rest
3. Accelerating ✓
4. Constant velocity
On velocity-time graph, sloping down line means:
1. Constant velocity
2. Accelerating
3. At rest
4. Decelerating ✓
Slope of velocity-time graph represents:
1. Speed
2. Acceleration ✓
3. Distance
4. Force
Area under velocity-time graph represents:
1. Speed
2. Force
3. Displacement ✓
4. Acceleration
Velocity-time graph: v goes from 0 to 20 m/s in 5 s. Acceleration is:
1. 4 m/s² ✓
2. 25 m/s²
3. 100 m/s²
4. 20 m/s²
Velocity-time graph: v goes from 30 to 10 m/s in 4 s. Acceleration is:
1. 5 m/s²
2. 20 m/s²
3. -5 m/s² ✓
4. 40 m/s²
Constant velocity of 10 m/s for 5 s. Distance traveled:
1. 15 m
2. 10 m
3. 2 m
4. 50 m ✓
Velocity-time graph: triangle with base 10 s, height 20 m/s from zero. Distance:
1. 30 m
2. 10 m
3. 100 m ✓
4. 200 m
Negative velocity on v-t graph means:
1. Moving in opposite/negative direction ✓
2. Slowing down
3. Error in measurement
4. Not moving
On d-t graph, can distance decrease (line go down)?
1. Yes, when at rest
2. Yes, when decelerating
3. Yes, when moving backward
4. No, distance cannot decrease ✓
To find velocity from d-t graph:
1. Calculate slope ✓
2. Calculate area under curve
3. Find x-intercept
4. Find y-intercept
To find acceleration from v-t graph:
1. Find maximum value
2. Find y-intercept
3. Calculate area under curve
4. Calculate slope ✓
Car accelerates from rest to 25 m/s in 5 s, then constant 25 m/s for 10 s. Total distance:
1. 62.5 m
2. 187.5 m
3. 125 m
4. 312.5 m ✓
On v-t graph, what does the x-intercept represent?
1. Acceleration
2. Time when velocity becomes zero ✓
3. Distance
4. Maximum velocity
Steeper slope on d-t graph means:
1. Higher speed ✓
2. More acceleration
3. Less acceleration
4. Lower speed
On v-t graph, area above and below time axis:
1. Above = forward displacement, below = backward ✓
2. Below = error
3. Above = faster only
4. Both mean same thing
Average speed from d-t graph:
1. Area under curve
2. Slope at midpoint
3. Maximum slope
4. Total distance / total time ✓
📖 science_quiz4_6_pressure
Pressure is defined as:
1. Force times distance
2. Force times area
3. Force per unit area ✓
4. Force divided by time
Pressure formula:
1. P = m×a
2. P = F/A ✓
3. P = ρgh only
4. P = F×A
SI unit of pressure:
1. Watt (W)
2. Pascal (Pa) ✓
3. Joule (J)
4. Newton (N)
1 Pascal equals:
1. 1 kg/m²
2. 1 J/m²
3. 1 m/s²
4. 1 N/m² ✓
Same force on smaller area results in:
1. Zero pressure
2. Lower pressure
3. Higher pressure ✓
4. Same pressure
Why does knife cut easily?
1. Sharp edge = small area = high pressure ✓
2. Knife is metal
3. Knife is heavy
4. Knife is long
Why do snowshoes prevent sinking?
1. Large area = low pressure ✓
2. They're made of wood
3. They're waterproof
4. Small area = high pressure
Thumb tack has:
1. Sharp point on both ends
2. Sharp point (high P into wall) and flat head (low P on thumb) ✓
3. No special design
4. Flat on both ends
Pressure in liquid increases with:
1. Width of container
2. Total volume
3. Depth ✓
4. Container shape
Formula for liquid pressure:
1. P = mv
2. P = F/A only
3. P = mgh
4. P = ρgh ✓
Atmospheric pressure at sea level:
1. Zero
2. About 101,325 Pa (1 atm) ✓
3. 9.8 Pa
4. Infinite
Why don't we feel atmospheric pressure?
1. We're too small
2. It doesn't exist
3. Internal body pressure equals external ✓
4. Air has no mass
Atmospheric pressure decreases with:
1. Altitude ✓
2. Latitude
3. Depth
4. Temperature alone
At 10 m depth in water, pressure is about:
1. 10 atmospheres
2. 1 atmosphere
3. 2 atmospheres (1 atm + 1 atm from water) ✓
4. 0 atmospheres
Pascal's Principle states:
1. Pressure increases with depth
2. Pressure equals force over area
3. Liquids are incompressible
4. Pressure applied to fluid transmitted throughout ✓
Hydraulic systems work based on:
1. Archimedes' Principle
2. Bernoulli's Principle
3. Pascal's Principle ✓
4. Boyle's Law
In hydraulic system, small piston (0.01 m²) with 50 N force. Large piston (0.1 m²) produces:
1. 500 N ✓
2. 5 N
3. 50 N
4. Cannot determine
Hydraulic car brakes:
1. Eliminate force
2. Reduce force
3. Keep force same
4. Multiply force from pedal to brake pads ✓
Buoyant force is:
1. Upward force exerted by fluid on object ✓
2. Weight of object
3. Force propelling boat
4. Downward force on object
Archimedes' Principle:
1. Buoyant force = pressure
2. Buoyant force = weight of object
3. Buoyant force = volume
4. Buoyant force = weight of fluid displaced ✓
Object floats when:
1. Buoyant force < weight
2. Buoyant force ≥ weight ✓
3. Object is light
4. Object is small
Object sinks when:
1. Object is heavy
2. Buoyant force < weight (object denser than fluid) ✓
3. Object is large
4. Buoyant force > weight
Steel ship floats because:
1. Hollow shape displaces large volume of water ✓
2. Water holds it up
3. Steel is light
4. Magic
Submarine dives by:
1. Filling ballast tanks with water (increasing density) ✓
2. Emptying tanks
3. Increasing speed
4. Swimming down
Hot air balloon rises because:
1. Helium inside
2. Hot air weighs more
3. Wind pushes it up
4. Hot air less dense than cold air ✓
📖 science_quiz4_5_momentum_conservation
Momentum is defined as:
1. Mass times acceleration
2. Force times distance
3. Mass times velocity ✓
4. Force times time
Momentum formula:
1. p = ma
2. p = mv ✓
3. p = mgh
4. p = Ft
Unit of momentum:
1. J
2. kg·m/s ✓
3. N
4. W
Momentum is a:
1. Dimensionless quantity
2. Constant
3. Scalar quantity
4. Vector quantity ✓
A 10 kg object moving at 5 m/s has momentum:
1. 2 kg·m/s
2. 15 kg·m/s
3. 50 kg·m/s ✓
4. 50 N
Stationary objects have momentum of:
1. Zero ✓
2. Cannot determine
3. Infinite
4. Depends on mass
Law of Conservation of Momentum states:
1. Total momentum before = total after (isolated system) ✓
2. Momentum always increases
3. Momentum is always zero
4. Momentum equals force
Conservation of momentum applies:
1. Only on Earth
2. Only in isolated systems (no external forces) ✓
3. Only in collisions
4. Always, everywhere
In elastic collision:
1. Neither conserved
2. Only KE conserved
3. Both momentum and KE conserved ✓
4. Only momentum conserved
In inelastic collision:
1. Both momentum and KE conserved
2. Only KE conserved
3. Neither conserved
4. Only momentum conserved ✓
In perfectly inelastic collision:
1. Objects bounce apart perfectly
2. Objects stick together ✓
3. No momentum conserved
4. KE is conserved
Two identical cars collide head-on at same speed. After collision:
1. Both continue backward
2. One stops, one continues
3. Both at rest (if perfectly inelastic) ✓
4. Both continue forward
Impulse is defined as:
1. Change in momentum ✓
2. Force times distance
3. Energy transferred
4. Mass times velocity
Impulse can also be calculated as:
1. Power times distance
2. Mass times acceleration
3. Force times time ✓
4. Work divided by time
Impulse-Momentum theorem:
1. F = ma
2. W = Fd
3. KE = ½mv²
4. F·Δt = Δp ✓
To reduce force in collision, you should:
1. Decrease collision time
2. Increase momentum
3. Increase collision time ✓
4. Increase mass
Airbags work by:
1. Increasing collision time ✓
2. Increasing force
3. Decreasing momentum
4. Stopping car faster
Crumple zones in cars:
1. Eliminate momentum
2. Make car heavier
3. Increase speed
4. Extend collision time ✓
When catching ball, you pull glove back to:
1. Increase contact time, reduce force ✓
2. Look professional
3. Stop ball faster
4. Increase force
Follow-through in hitting ball:
1. Looks good only
2. Decreases impulse
3. Stops ball faster
4. Increases contact time, increases impulse ✓
1000 kg car at 20 m/s collides with stationary 1000 kg car. They stick. Final velocity:
1. 0 m/s
2. 10 m/s ✓
3. 20 m/s
4. 5 m/s
Two skaters (50 kg and 75 kg) push off. 50 kg moves at 3 m/s. 75 kg moves at:
1. 3 m/s
2. 2 m/s (opposite direction) ✓
3. 1.5 m/s
4. 4.5 m/s
Recoil of gun when fired is due to:
1. Conservation of momentum ✓
2. Friction
3. Gravity
4. Air resistance
Why does bullet have higher speed than gun recoil?
1. Bullet has much less mass ✓
2. Gun has less mass
3. Momentum not conserved
4. Forces are unequal
Momentum conservation is based on:
1. Newton's Second Law only
2. Law of Gravitation
3. Newton's Third Law
4. Newton's First Law only ✓
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