Unit 2

Question 1

Define diffusion:

Answer 1

Net movement (overall direction) of particles from a region of high concentration to lower concentration over time, requiring no energy to do so (passive transport).

Question 2

Is a gas a fluid?

Answer 2

Yes.

Question 3

What is equilibrium?

Answer 3

When the particles are evenly distributed throughout a space.

Question 4

What are the 4 factors affecting diffusion?

Answer 4

1. Concentration gradient
2. Surface area
3. Distance
4. Temperature

Question 5

Give an example of diffusion:

Answer 5

The circulatory system. Constant flow of blood maintains a concentration gradient (if it doesn’t move, it will reach equilibrium!). Being warmblooded helps with this process.