Across
- 4. Earth's thick, outer layer that forms landmasses
- 7. The center of the Earth
- 8. The Earth's outermost layer
- 9. Earth's shells that are defined by chemical composition
- 10. Earth's solid, innermost layer
- 11. The movement of heat through the Earth's mantle
Down
- 1. A liquid layer of iron and nickel
- 2. Compactness of a substance
- 3. The rocky layer between the crust and outer core
- 5. Vibrations that travel through the Earth, created by earthquakes, volcanic eruptions, and explosions
- 6. Earth's thin, outer layer beneath the oceans
