3.7 Understanding Diffusion

What is diffusion?

• Movement of solids

• Movement of particles from high to low concentration

• Movement of liquids only

• Movement of particles from low to high concentration

In which states of matter does diffusion occur?

• Solids only

• Liquids only

• Liquids and gases

• Gases only

Why does diffusion not happen in solids?

• Solids are too hot

• Solids are too light

• Particles in solids cannot move freely

• Solids are made of gas

What causes diffusion?

• Gravity

• Random movement of particles

• Light

• Electricity

What is the direction of particle movement during diffusion?

• From low to high concentration

• In a straight line

• From high to low concentration

• In circles

What is the main reason particles move during diffusion?

• They are pushed by wind

• They are pulled by magnets

• They have energy and move randomly

• They are heavy

Which of the following is an example of diffusion?

• Ice melting

• Smelling perfume in a room

• Boiling water

• Freezing juice

What happens to the speed of diffusion when temperature increases?

• It decreases

• It stays the same

• It increases

• It stops

Which particles diffuse faster?

• Large particles

• Small particles

• Heavy particles

• Particles in solids

Which state allows diffusion to happen the fastest?

• Solid

• Gas

• Liquid

• Plasma