Across
- 2. primary waves that can pass through solid and liquid
- 4. The driving force behind continental movement
- 5. The connected area of the crust and upper mantle
- 6. The hottest layer of the Earth
- 7. A liquid layer of the Earth made of iron and nickel
- 8. The study of earthquakes
- 9. The thinnest, solid layer of the Earth
- 10. The thickest layer of the Earth
Down
- 1. The supercontinent made of all continents together
- 3. The idea that continents move
- 8. secondary waves that cannot pass through liquid