Focus On: Diffusion

Part 1 - Keywords:

1. Diffusion

2. Concentration

3. Membrane

4. Passive Transport

5. Equilibrium

6. Solvent

7. Solute

8. Osmosis

9. Selectively Permeable

10. Surface Area

Part 2 - Key Facts:

1. Diffusion is the process by which molecules or ions move from an area of higher concentration to an area of lower concentration.

2. Concentration gradient refers to the difference in concentration between two regions.

3. Diffusion can occur through a membrane and is a passive transport process.

4. Equilibrium is reached when there is an equal distribution of particles on both sides of a membrane.

5. Osmosis is a specific type of diffusion involving the movement of water molecules.

6. A selectively permeable membrane allows only certain substances to pass through.

7. Surface area affects the rate of diffusion; a larger surface area allows for faster diffusion.

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Part 3 - Quick Quiz:

1. What is diffusion? a) Movement of particles from low to high concentration b) Movement of particles from high to low concentration c) Movement of particles without any direction Answer: b) Movement of particles from high to low concentration

2. What is osmosis? a) The movement of water from low to high concentration b) The movement of water from high to low concentration c) The movement of solute particles Answer: b) The movement of water from high to low concentration

3. What is a selectively permeable membrane? a) A membrane that allows all substances to pass through b) A membrane that allows only certain substances to pass through c) A membrane that blocks all substances Answer: b) A membrane that allows only certain substances to pass through

Part 4 - Going Further:

Question: Explain how diffusion and osmosis are essential processes in biology.

Answer: Diffusion and osmosis are fundamental processes in biology that ensure the movement of substances within and across cells. Diffusion enables the movement of gases and small molecules in and out of cells, allowing for the exchange of nutrients, waste, and other vital substances. Osmosis, a specific type of diffusion involving water molecules, is essential for maintaining the balance of water content in cells. Both processes are crucial for cellular functions, such as respiration, waste removal, and maintaining cell turgidity.

Part 5 - Revision Tips: To understand diffusion and osmosis, practice visualizing the movement of particles from high to low concentration and how it relates to biological systems. Create diagrams and use analogies to reinforce your understanding.

Part 6 - More Help: WANT 25% Off GCSE Science And Math Tuition OR Past Paper Revision Resources? Click this link - piacademy.co.uk and use this COUPON CODE - GCSE25.

Stay tuned for the next issue, where we'll delve into another exciting topic in GCSE Chemistry.