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Investigate Mixtures

In this worksheet, students will explore mixtures. Mixtures can involve elements, compounds or elements and compounds!

'Investigate Mixtures' worksheet

Key stage:  KS 3

Year:  Year 8 Science worksheets

Curriculum topic:   Chemistry: Pure and Impure Substances

Curriculum subtopic:   Mixtures, including Dissolving

Popular topics:   Chemistry worksheets

Difficulty level:  

Worksheet Overview

A mixture is defined as:


Two or more substances, mixed but not chemically joined


To put this a simpler way, it is two or more substances that are present in the same container but are not joined to each other by chemical bonds. 


Shown below here is a mixture of elements. An element contains only one type of atom and, because these atoms are not combined, it is a mixture of elements.


We can say this mixture is impure - that's because there are different elements present here.


Atoms of elements mixed together



Shown below is a mixture of compounds. A compound is made of two or more elements chemically joined together.


Look closely at the diagram and you will see the two different compounds but, because they are not joined to each other, it is a mixture of compounds.


 Mixture of compounds



Shown below is a mixture of an element and a compound. The two pink atoms combined represent the element. The atoms are the same and so this is an element.


The compound is made of different atoms bonded together.


Air is a mixture of elements such as nitrogen and oxygen, but also contains a small number of other gases such as carbon dioxide, and the noble gases.


Mixture of elements and compounds


Want a bit more help with this before you begin? Why not watch this short video?

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