Across
- 2. A crack in Earth's crust where two plates meet and move
- 4. Tectonics The scientific idea that Earth's surface is made of plates that move.
- 5. The layer of solid rock under Earth's crust.
- 6. A deep valley in the ocean floor where one plate goes under another.
Down
- 1. A crack or split in Earth's crust where the plates are pulling apart
- 3. The hard, outer layer of Earth that includes the crust and the upper part of the mantle.