GIZMOS Student Exploration Diffusion
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1. What is diffusion?
A. Movement of water only
B. Movement of particles from high to low concentration
C. Movement of particles from low to high concentration
D. Movement of solids only
B
explanation: Diffusion is the movement of particles from an area of higher
concentration to an area of lower concentration.
2. Which factor increases the rate of diffusion?
A. Lower temperature
B. Larger particle size
C. Higher temperature
D. Thicker membrane
C
explanation: Higher temperatures increase particle motion, speeding up
diffusion.
3. In diffusion, equilibrium is reached when:
A. Particles stop moving
B. Concentrations are equal
, C. Temperature drops
D. Membrane disappears
B
explanation: At equilibrium, particles continue moving but concentrations
are equal.
4. Which substance diffuses fastest?
A. Large protein
B. Small gas molecule
C. Large lipid
D. Solid crystal
B
explanation: Smaller molecules move faster and diffuse more quickly.
5. Diffusion requires:
A. Energy (ATP)
B. Enzymes
C. No energy
D. Light
C
explanation: Diffusion is a passive process and does not require energy.
6. Which direction do particles move in diffusion?
A. Random only
B. High to low concentration
C. Low to high concentration
D. Circular path
B
explanation: Net movement is from high to low concentration.
7. What happens when concentration gradient increases?
A. Diffusion slows
B. Diffusion stops
C. Diffusion speeds up
D. No effect
, C
explanation: A steeper gradient increases diffusion rate.
8. Which condition slows diffusion?
A. Higher temperature
B. Smaller particles
C. Thicker barrier
D. Larger surface area
C
explanation: Thicker barriers make it harder for particles to pass through.
9. Diffusion is most important in:
A. Bone formation
B. Gas exchange
C. Muscle contraction
D. Digestion only
B
explanation: Diffusion is key in oxygen and carbon dioxide exchange.
10.Which state of matter diffuses fastest?
A. Solid
B. Liquid
C. Gas
D. Plasma
C
explanation: Gas particles move most freely and diffuse fastest.
11.A student places dye in water. What happens?
A. Dye stays in one place
B. Dye moves evenly throughout
C. Dye sinks only
D. Dye evaporates
B
explanation: Dye spreads due to diffusion until evenly distributed.
Exam Newest 2026-2027 Updated 100
Questions From Actual Exams Complete
Questions And Correct Detailed
Answers (Expert Verified Exam)
|Already Graded A+||Brand New!!
1. What is diffusion?
A. Movement of water only
B. Movement of particles from high to low concentration
C. Movement of particles from low to high concentration
D. Movement of solids only
B
explanation: Diffusion is the movement of particles from an area of higher
concentration to an area of lower concentration.
2. Which factor increases the rate of diffusion?
A. Lower temperature
B. Larger particle size
C. Higher temperature
D. Thicker membrane
C
explanation: Higher temperatures increase particle motion, speeding up
diffusion.
3. In diffusion, equilibrium is reached when:
A. Particles stop moving
B. Concentrations are equal
, C. Temperature drops
D. Membrane disappears
B
explanation: At equilibrium, particles continue moving but concentrations
are equal.
4. Which substance diffuses fastest?
A. Large protein
B. Small gas molecule
C. Large lipid
D. Solid crystal
B
explanation: Smaller molecules move faster and diffuse more quickly.
5. Diffusion requires:
A. Energy (ATP)
B. Enzymes
C. No energy
D. Light
C
explanation: Diffusion is a passive process and does not require energy.
6. Which direction do particles move in diffusion?
A. Random only
B. High to low concentration
C. Low to high concentration
D. Circular path
B
explanation: Net movement is from high to low concentration.
7. What happens when concentration gradient increases?
A. Diffusion slows
B. Diffusion stops
C. Diffusion speeds up
D. No effect
, C
explanation: A steeper gradient increases diffusion rate.
8. Which condition slows diffusion?
A. Higher temperature
B. Smaller particles
C. Thicker barrier
D. Larger surface area
C
explanation: Thicker barriers make it harder for particles to pass through.
9. Diffusion is most important in:
A. Bone formation
B. Gas exchange
C. Muscle contraction
D. Digestion only
B
explanation: Diffusion is key in oxygen and carbon dioxide exchange.
10.Which state of matter diffuses fastest?
A. Solid
B. Liquid
C. Gas
D. Plasma
C
explanation: Gas particles move most freely and diffuse fastest.
11.A student places dye in water. What happens?
A. Dye stays in one place
B. Dye moves evenly throughout
C. Dye sinks only
D. Dye evaporates
B
explanation: Dye spreads due to diffusion until evenly distributed.
