Across
- 3. Plate boundaries that slide past each other
- 6. Solid outer layer of earth that consists of crust and upper mantle
- 7. The solid, plastic layer of the mantle beneath the lithosphere
- 8. The supercontinent that formed 300 million years ago and broke up
- 9. A piece of lithosphere that has a unique geologic history
- 10. Plate boundaries move apart
Down
- 1. The theory that explains how large pieces of the lithosphere move and change shape
- 2. The hypothesis that states that all the continents were together and drifted apart
- 4. The Process by which Earth's crust breaks apart
- 5. Tectonic plate boundaries that collide