Osmosis, Diffusion and Active Transport

• Biology
• Lower Secondary (Key Stage 3)

Osmosis, Diffusion and Active Transport

Nucleus

Chloroplast

Mitochondria

Cytoplasm

Cell membrane

Cell wall

Vacuole

What is the function of the cell membrane?

What 2 substances do all cells need to survive?

There a 3 ways for substances to move into and out of cells.

Label the diagram and place ONE arrow to show the direction of diffusion.

More concentrated

Less concentrated

Label the diagram and place ONE arrow to show the direction of diffusion.

More concentrated

Less concentrated

Label the diagram and place ONE arrow to show the direction of diffusion.

More concentrated

Less concentrated

Label the diagram and place ONE arrow to show the direction of diffusion.

More concentrated

Less concentrated

Which way will the particles diffuse?

Molecules are able to diffuse because they are constantly moving around.

1. True
2. False

In which state(s) of matter can diffusion occur?

1. Solids
2. Liquids
3. Gases
4. Liquids and gases

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

1. True
2. False

Diffusion requires energy.

1. True
2. False

Particles diffuse until they are evenly spaced apart.

1. True
2. False

Why does diffusion not happen in solids?

Oxygen

Glucose

Carbon dioxide

Waste products

Match each substance to its movement.

Diffuses into cells.

Diffuses into cells.

Diffuses out of cells.

Diffuses out of cells.

Label the diagram and place ONE arrow to show the direction of osmosis.

More concentrated

Less concentrated

Label the diagram and place ONE arrow to show the direction of osmosis.

More concentrated

Less concentrated

Label the diagram and place ONE arrow to show the direction of osmosis.

More concentrated

Less concentrated

Label the diagram and place ONE arrow to show the direction of osmosis.

More concentrated

Less concentrated

Label the diagram and place ONE arrow to show the direction of active transport.

More concentrated

Less concentrated

Label the diagram and place ONE arrow to show the direction of active transport.

More concentrated

Less concentrated

Label the diagram and place ONE arrow to show the direction of active transport.

More concentrated

Less concentrated

Task

Complete the table comparing the 3 types of movement:

1. Add an arrow showing the direction the particles will move for each diagram.

2. Complete the 3 rows beneath.

3. Add notes to the examples box as I go through it.