Lesson objectives: Describe the structure of the earth Compare the layers of the earth Describe the changes to the composition of the Earth’s atmosphere The power point can be followed as a complete lesson with all the necessary video links and worksheets. It has been differentiated to Bronze, Silver, Gold and SEN. There is no need to print the work sheets the can be displayed on the board although printing the worksheets would be much better use of this resource. Another fantastic resource by Anhus!