GCSE Biology – Diffusion

Last updated: 20/04/2020
OCR Gateway GCSE Science – Combined science foundation Suppling the cell GCSE Biology – Diffusion

Learning Objectives

-I can define the term diffusion
-I can recall which substances are moved by diffusion
-I can describe the process of diffusion
-I can explain how different factors affect diffusion
-I can describe the advantage of having a large surface area to volume ratio and give examples

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  1. Current
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  1. What is one definition for diffusion?

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  2. What is one definition for diffusion?

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  3. What do particles travel across as part of diffusion?

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  4. Which ways can substances move via diffusion?

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  5. What is the energy source for diffusion?

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  6. What does net movement mean?

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  7. What equation is used to represent net movement?

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  8. What type of substances can take part in diffusion?

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  9. What type of substances can take part in diffusion?

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  10. What gases are exchanged by diffusion in the body?

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  11. What is exchanged in the small intestine?

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  12. What is exchanged in the lungs?

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  13. What is exchanged to the placenta?

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  14. What is exchanged in nerve cells?

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  15. What is exchanged in the roots of plants?

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  16. What waste product is removed by diffusion from body cells for excretion?

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  17. How are exchange surfaces and organs specialised for diffusion?

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  18. How are the lungs adapted to carry out diffusion?

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  19. How are the roots of a plant adapted to carry out diffusion?

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  20. What affects the rate of diffusion?

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  21. What affects the rate of diffusion?

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  22. How would an organism increase its rate of diffusion?

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  23. What does a high surface area to volume ratio mean?

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  24. Why do multicellular organisms need exchange surfaces?

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  25. Why don’t unicellular organisms need exchange surfaces?

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