factors affect rate of diffusion

Question 1

concentration

Answer 1

The steeper the concentration gradient, the faster the rate of diffusion.

Question 2

distance

Answer 2

The greater the diffusion distance, the further the molecules must travel and the slower the rate of diffusion

Question 3

surface area

Answer 3

The larger the surface area, the greater the number of molecules that can diffuse across in a given time, so the faster the rate of diffusion.