B2.1 Diffusion

Question 1

What does diffusion mean?

Answer 1

Gradual movement of particles from a high concentration to a low concentration.

Question 2

Which part of a cell do the particles diffuse through?

Answer 2

The membrane.

Question 3

What determines the speed of the reaction?

Answer 3

The concentration.

Question 4

What is meant by ‘Osmosis’?

Answer 4

A type of diffusion with water passing through a semi-permeable membrane. From high concentrations to low concentrations.

Question 5

What happens when potato is added to salt water?

Answer 5

It bends because of the change in concentrations and the movement of the particles causing the potato to become flaccid.

Question 6

What is diffusion?

Answer 6

The spreading out of particles from an area of high concentration to an area of low concentration.