Loading please wait

The smart way to improve grades

Comprehensive & curriculum aligned

Try an activity or get started for free

Understand Physical Changes of State

In this worksheet, students will investigate physical changes of state.

'Understand Physical Changes of State' worksheet

Key stage:  KS 2

Year:  Year 4 Science worksheets

Curriculum topic:   States of Matter

Curriculum subtopic:   Reversible Changes

Popular topics:   Biology worksheets

Difficulty level:  

Worksheet Overview

From all your work, and your life experience, you'll know that things around you are basically found in three different states:


Solid    Liquid    and  Gas


You also know that pure substances can move between these states according to whether they're being heated or cooled. Yes?


Ice cube Blow torch    Sun


Now, look at this diagram carefully - it shows how materials change between solids, liquids and gases:


  melting   evaporation  
  freezing   condensation  


Now look at it again...


What's happening to change a solid to a liquid to a gas?  It's being heated.

What's happening to change a gas to a liquid to a solid?  It's being cooled.


These are physical changes and they can be reversed, which means they go back to what they were before.

When materials change in this way, it's called changing state.

Do you notice each special word as the state changes (melting, condensing, etc.)?

Water is the most obvious example to demonstrate how it changes state.  

Solid = Ice

Liquid = Water

Gas = Steam (or, better, water vapour).


the water cycle


Of course, many substances you come across will change like this - water's just an obvious example.


OK, to be able to talk about and describe these changes, we must understand the science vocabulary associated with each of the physical changes, so that's what we're going to be looking at in this activity.



Are you ready to get involved? Let's get going!

Remember, you can come back to this page at any time simply by clicking the red button on the right-hand side of any page you're on.

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

Popular Science topics

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