Net Movement B2

Question 1

What is diffusion?

Answer 1

Diffusion is the net movement of particles from an area of high concentration to an area of low concentration.

Question 2

What is osmosis?

Answer 2

Osmosis is the net movement of water particles across a partially permeable membrane from a region of high water concentration to a region of low water concentration.

Question 3

What is water concentration?

Answer 3

The amount of solutes like sugars or salts in water, e.g. more solutes = low water concentration.

Question 4

What is active transport?

Answer 4

Active transport is the movement of molecules across a cell membrane from a region of low concentration to a region of high concentration, and requiring energy from respiration.

Question 5

What is an example of active transport?

Answer 5

Root hair cells in plants have a higher concentration of minerals in the cell than the soil so they must resort to active transport.