You are going to investigate the hardness of different materials. Hardness means how firm an object is, and how easily it is cut or scratched.

You will need to scratch each material using a coin and / or a screw and measure how easy it was to scratch. You might give it a score, which you can use later to compare the hardness of each object.

If you can think of a better method of testing the hardness of the objects, share your idea with your group and choose the best method.

You will need to record your results in a graph or a table to make it easier to compare them.

Created by Mark Warner - Teaching Ideas for Primary Teachers - http://www.teachingideas.co.uk