14 6
The diagram shows the structure of the Earth. crust
core mantle
not to scale
(a) The lithosphere is part of the structure of the Earth. What is meant by the lithosphere? ................................................................................................................................................... .............................................................................................................................................. [1] (b) Geologists have problems studying the structure of the Earth. Write about one of these problems. ................................................................................................................................................... .............................................................................................................................................. [1] (c) The theory of plate tectonics did not exist in 1900. The theory of plate tectonics is now widely accepted by scientists. Describe some of the stages in the development of the theory of plate tectonics. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [2]
Š OCR 2015