Drawing the structure of the earth - numeracy and geography

If you are trying to incorporate more numeracy and problem solving into Geography lessons then this task could be the answer. Knowing the structure of the earth is vital for pupils to understand the theory of plate tectonics but instead of getting them to copy a diagram from a textbook how about getting them to construct their own scale diagram using the instructions shown below. This activity encourages pair work as well as refreshing pupils minds about how scale works.