Diffusion

What is the effect of temperature on the rate of diffusion?

• Higher temperatures decrease the rate of diffusion because particles move slower.

• Higher temperatures increase the rate of diffusion because particles move faster.

• Temperature has no effect on the rate of diffusion.

• Lower temperatures increase the rate of diffusion because particles move faster.

What role does surface area play in diffusion?

• A larger surface area allows for faster diffusion rates.

• Surface area has no effect on diffusion rates.

• A smaller surface area allows for faster diffusion rates.

• Surface area only affects diffusion in liquids.

Does diffusion occur in solids?

• Yes, diffusion occurs in all states of matter.

• No, diffusion primarily occurs in liquids and gases.

• Diffusion occurs only in gases.

• Diffusion occurs in solids but at a very slow rate.

What is an example of diffusion in everyday life?

• The smell of perfume spreading in a room.

• Water boiling in a pot.

• Ice melting in a glass of water.

• A car moving on a highway.

What is the relationship between concentration and diffusion rate?

• The greater the difference in concentration, the faster the rate of diffusion.

• Diffusion rate is independent of concentration differences.

• Higher concentration always leads to slower diffusion rates.

• Concentration has no effect on diffusion rate.

What happens to the particles in a substance when it is heated?

• The particles slow down and come closer together.

• The particles speed up and spread out.

• The particles remain unchanged.

• The particles dissolve into the air.

What is osmosis?

• The movement of solutes from an area of low concentration to an area of high concentration.

• The diffusion of water molecules through a selectively permeable membrane.

• The process of active transport of ions across a membrane.

• The absorption of nutrients by cells through endocytosis.

How does the size of molecules affect diffusion?

• Smaller molecules diffuse faster than larger molecules.

• Larger molecules diffuse faster than smaller molecules.

• Molecule size has no effect on diffusion rate.

• All molecules diffuse at the same rate regardless of size.

What is a concentration gradient?

• A concentration gradient is the difference in the concentration of a substance between two areas.

• A concentration gradient is the uniform distribution of a substance in a single area.

• A concentration gradient is the process of mixing two substances together.

• A concentration gradient is the measurement of temperature in a solution.

What is the difference between diffusion and active transport?

• Diffusion is a passive process that does not require energy, while active transport requires energy to move substances against their concentration gradient.

• Diffusion requires energy to move substances against their concentration gradient, while active transport is a passive process.

• Both diffusion and active transport are passive processes that do not require energy.

• Active transport is faster than diffusion and does not involve any energy consumption.