The earth's layers and platesLearning goals:
1. Describe how the earth’s layers fit together.
2. Describe what tectonic plates and tectonic plate boundaries are.
3. Describe the movements of plate tectonics in the past. (VWO)
The earth seems to be one solid sphere, but if you look more closely you'll notice that the earths crust moves very slowly.
These movements are caused by the inner structure of the earth.