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Know How Some Materials Change State

In this worksheet, students will investigate how some materials change state when heated or cooled.

'Know How Some Materials Change State' worksheet

Key stage:  KS 2

Year:  Year 4 Science worksheets

Curriculum topic:   States of Matter

Curriculum subtopic:   Reversible Changes

Difficulty level:  

Worksheet Overview

Many of the different materials you use day in, day out, can be changed by a change in the temperature. What will happen to them?

 

Sometimes they melt, sometimes they boil, sometimes they freeze - in other words, they change state. Substances can change from solids to liquids to gases, and back again!

 

You already know, from your experiences in life and from your science lessons, that some solids melt when heated. 

 

melting chocolate

 

Some liquids boil when heated and turn to vapour.

 

kettle boiling

 

Similarly, when liquids are cooled down, some turn solid (in a process called 'freezing') and, amazingly, you can cool some gases down enough to turn them back into liquids (that's called 'condensing').

 

condensation

 

In this activity, we will think about the materials in the questions and what we have learned about them. We will then use that information to help to answer the questions on changes of state.

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