Compounds, mixtures and elements

This task is about grouping substances as compounds, mixtures or elements.
A compound is a substance that contains atoms of two or more elements joined together and cannot be easily separated.
A mixture is a substance composed of two or more forms of matter that can be easily separated.
An element is a pure substance composed of one type of atom.

Question

a)  The diagrams represent different types of atoms.
     i) Which diagram shows a mixture?

    • compounds-mixtures-substances-image-A.png

    • compounds-mixtures-substances-image-B.png

    • compounds-mixtures-substances-image-C.png

Question

     ii)  Which diagram shows a compound? 

    • compounds-mixtures-substances-image-A.png

    • compounds-mixtures-substances-image-B.png

    • compounds-mixtures-substances-image-C.png

Question Change answer

b)  Here are twelve substances. Six are compounds, four are mixtures and two are elements.
     Group the substances into the correct boxes.
milk
oxygen
carbon dioxide
iron
sea water
sand
sugar
copper oxide
salt
rust
air
water
Compounds
Mixtures
Elements
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