Year 8 Diffusion

The picture shows

• changing state from liquid to gas

• transfer of heat

• particles spreading out by diffusion

• active transport

Tags

NGSS.MS-PS1-4

Which diagram best shows the end result of a diffusion experiment?

• F

• G

• H

• J

A student put a few drops of lemon juice into an uninflated balloon. They then tied a knot in the balloon, placed it in a shoe box with a lid. The following day, the student opened the box and could smell lemon in the box. Through which process were particles able to pass through the balloon?

• respiration

• magic

• osmosis

• diffusion

Diffusion occurs because particles in substances are always

• moving

• hot or cold

• changing shape

• trying to escape

Tags

NGSS.MS-PS3-5

What is diffusion?

• when particles move

• when particles spread out

• mixing up

• it's complicated

Diffusion occurs only in solids

• True

• False

Tags

NGSS.MS-PS1-4

When does diffusion stop?

• After a day and a night

• When the particles are evenly spread out

• When there are no particles left

• When all the particles leave the system

Tags

NGSS.MS-PS1-4

How does an increase in temperature affect diffusion?

• Diffusion speeds up

• Diffusion slows down

• Temperature has no effect

Tags

NGSS.MS-PS1-4

What happens to particles when they are heated?

• They move faster and spread out

• They expand

• They absorb energy and change colour

• They move closer together and speed up

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following is NOT an example of diffusion?

• smelling coffee at Starbucks

• smoke from a fire spreading out

• melting water

• gas exchange in your lungs