Plate Tectonics and Layers of the Earth
Across
- 5. boundaries that cause earthquakes
- 7. boundaries that create volcanoes and mountains
- 8. Began to explore the theory of plate tectonics and continental drift
- 9. plate that is less dense
Down
- 1. layer of the earth directly under the crust
- 2. outermost layer of the earth
- 3. boundaries that create sea floor spreading and rift valleys
- 4. solid center of the earth
- 6. plate that is the most dense