The earth's layers and platesLearning goals:
1. Describe in which direction the tectonic plates move.
2. Expain why earth’s tectonic plates move
3. Describe the effect of the three plate movements
4. Describe the ridge-push and slab pull mechanisms
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.