Loading please wait

The smart way to improve grades

Comprehensive & curriculum aligned

Try an activity or get started for free

Understand The Movement of Particles in Changes of State

In this worksheet, students will answer questions on the movement of particles during changes of state.

'Understand The Movement of Particles in Changes of State' worksheet

Key stage:  KS 3

Year:  Year 8 Science worksheets

Curriculum topic:   Chemistry: The Particulate Nature of Matter

Curriculum subtopic:   Changes of State: Particle Model

Difficulty level:  

Worksheet Overview

What happens to your ice cream on a really hot day, and what happens to the water vapour in the air as it touches a cold window?


an ice cream


That's right, they change state. The particles in the ice cream and the water vapour start behaving differently as they are heated or cooled. Let's find out more.


particles in solids, liquids and gases


As you can see, when heated, particles in a substance start to move around more and get further apart - the more they are heated the further apart they get and eventually the substance will change state. This is because the particles are gaining energy. The opposite happens when a substance is cooled. The particles slow down and become closer together because they are losing energy. 


There are some important words in the diagram above that you'll need to remember about state changes. One that you may not have come across before is subliming. Sublimation happens when a solid is heated and changes directly into a gas, skipping the liquid state altogether. This is what happens to solid carbon dioxide, or 'dry ice' as it is known. 


Got it? Let's try some questions on heating and cooling and the resulting changes of state. 

What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started

Try an activity or get started for free

  • National Tutoring Awards 2023 Shortlisted / Parents
    National Tutoring Awards 2023 Shortlisted
  • Private-Tutoring-WINNER-EducationInvestor-Awards / Parents
    Winner - Private Tutoring
  • Bett Awards Finalist / Parents
  • Winner - Best for Home Learning / Parents
    Winner - Best for Home Learning / Parents