GCSE Biology – Factors affecting diffusion

Last updated: 26/05/2020

Edexcel GCSE Science – Biology higher Exchange and transport in animals GCSE Biology – Factors affecting diffusion

Learning Objectives

-I can explain the factors that affect the rate of diffusion
-I can use Ficks law to calculate the rate of diffusion

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Question 1 of 25

1. Question
What is the definition of diffusion?
- Spreading out of particles
- Coming together of particles
- Change in state of particles
- Change in temperature of particles
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Question 2 of 25

2. Question
What is the definition of diffusion?
- Resulting in a net movement from an area of higher concentration to lower concentration
- Resulting in no net movement
- Resulting in a net movement from an area of lower to higher concentration
- Resulting in a net movement of all particles to one side
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Question 3 of 25

3. Question
How many factors affect the rate of diffusion?
- 3
- 4
- 2
- 1
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Question 4 of 25

4. Question
What affects the rate of diffusion?
- Distance
- Energy
- Height
- Current
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Question 5 of 25

5. Question
What affects the rate of diffusion?
- Concentration difference
- Pressure difference
- Energy difference
- Time difference
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Question 6 of 25

6. Question
What affects the rate of diffusion?
- Surface area
- Time
- Energy
- Charge
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Question 7 of 25

7. Question
What happens if the diffusion distance gets larger?
- Diffusion occurs slower
- Diffusion occurs faster
- Nothing
- Diffusion stops
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Question 8 of 25

8. Question
What happens if the diffusion distance gets smaller?
- Diffusion occurs faster
- Diffusion occurs slower
- Nothing
- Diffusion stops
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Question 9 of 25

9. Question
What happens to the rate of diffusion if there is a larger difference in concentration?
- Diffusion occurs faster
- Diffusion occurs slower
- Nothing
- Diffusion stops
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Question 10 of 25

10. Question
What happens to the rate of diffusion if there is a smaller difference in concentration?
- Diffusion occurs slower
- Diffusion occurs faster
- Nothing
- Diffusion stops
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Question 11 of 25

11. Question
What happens to the rate of diffusion if there is a larger surface area?
- Diffusion occurs faster
- Diffusion occurs slower
- Nothing
- Diffusion stops
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Question 12 of 25

12. Question
What happens to the rate of diffusion if there is a smaller surface area?
- Diffusion occurs slower
- Diffusion occurs faster
- Nothing
- Diffusion stops
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Question 13 of 25

13. Question
Why does diffusion happen slower when the diffusion distance is larger?
- Particles have further to travel
- Particles do not have as far to travel
- Particles do not need as much energy
- Particles need more energy
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Question 14 of 25

14. Question
Why does diffusion happen quicker when the diffusion distance is smaller?
- Particles do not have as far to travel
- Particles have further to travel
- Particles do not need as much energy
- Particles need more energy
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Question 15 of 25

15. Question
What is Fick’s Law?
- The relationship between diffusion and the factors that affect it
- The relationship between the rate of diffusion and the time
- The relationship between the rate of diffusion and the number of particles
- The relationship between the rate of diffusion and the energy of particles
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Question 16 of 25

16. Question
What type of equation is Fick’s Law?
- Proportional
- Reversible
- Imaginary
- Real
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Question 17 of 25

17. Question
What is the sign signifying a proportional equation?
- ∝
- β
- ⇌
- α
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Question 18 of 25

18. Question
What is the sign signifying an inversely proportional equation?
- ∝
- β
- ⇌
- α
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Question 19 of 25

19. Question
What is the rate of diffusion proportional to?
- Surface area
- Time
- Thickness of the membrane
- Energy
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Question 20 of 25

20. Question
What is the rate of diffusion proportional to?
- Concentration difference
- Particle number
- Thickness of the membrane
- Charge
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Question 21 of 25

21. Question
What is the rate of diffusion inversely proportional to?
- Thickness of the membrane
- Concentration difference
- Surface area
- Time
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Question 22 of 25

22. Question
What is the Fick’s Law equation?
- Rate of diffusion ∝ surface area x concentration difference / thickness of membrane
- Rate of diffusion ∝ thickness of membrane x concentration difference / surface area
- Rate of diffusion ∝ surface area x thickness of membrane / concentration difference
- Rate of diffusion ∝ surface area x concentration difference x thickness of membrane
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Question 23 of 25

23. Question
When will the rate of diffusion double?
- When the concentration difference is doubled
- When the thickness of the membrane is doubled
- When the surface area is halved
- When the concentration difference is halved
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Question 24 of 25

24. Question
When will the rate of diffusion double?
- When the thickness of the exchange membrane is halved
- When the thickness of the membrane is doubled
- When the surface area is halved
- When the concentration difference is halved
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Question 25 of 25

25. Question
When will the rate of diffusion double?
- When the surface area is doubled
- When the thickness of the membrane is doubled
- When the surface area is halved
- When the concentration difference is halved
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