Loading please wait

The smart way to improve grades

Comprehensive & curriculum aligned

Try an activity or get started for free

Chemical and Physical Changes

In this worksheet, students will be introduced to the differences between physical and chemical changes from a matter in physics perspective.

'Chemical and Physical Changes' worksheet

Key stage:  KS 3

Curriculum topic:   Physics: Matter

Curriculum subtopic:   Physical Changes

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

There are two types of changes in the world around us: physical and chemical

 

Physical changes

 

If you let ice melt, it turns into water. There has been a change of state from solid to liquid, but it is still the same substance. It is easy to freeze water and make it ice again. You can even boil it and make it steam. It is still the same substance and no new substances have formed. These changes are reversible, which means the substance can turn back to its original state. These are called physical changes.

 

In physical changes the atoms remain the same and no chemical bonds change. For example, in water, two hydrogen atoms are still bonded to an oxygen atom, regardless of whether you have ice, water or steam. 

 

Different states of matter

 

Chemical changes

 

Chemical changes take place during chemical reactions.

 

 

In the image above, rearrangement of atoms is clearly shown for the production of ammonia: you can see one hydrogen atom from the water molecule joining the ammonia molecule, which now becomes NH4 (ammonium). The atoms remain the same, but their positions are rearranged, which means they bond with different atoms after the chemical change.

Chemical changes are permanent changes and cannot be reversed; they are irreversible. When a piece of wood burns, you cannot reverse the reaction to get the wood back. New substances have formed.

---- OR ----

Get started for free so you can track and measure your child's progress on this activity.

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
laptop

Try an activity or get started for free

  • educational
  • bettfutures
  • cxa
  • pta
  • era2016
  • BDA award
  • Explore LearningTuition Partner
  • tacm