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.
sea water
carbon dioxide
air
milk
copper oxide
sugar
iron
sand
water
oxygen
rust
salt
Compounds
Mixtures
Elements