Across
- 4. The layer of Earth made of liquid metal.
- 6. When Earth is the farthest from the Sun.
- 8. The separation of Earth into layers based on density.
- 9. When Earth is the closest to the Sun.
- 10. The boundary between the crust and the mantle.
- 11. The layer of Earth made of solid metal.
- 13. The thinner part of the crust. Mostly made of basalt.
- 14. The thickest layer of Earth. About 2800 miles thick.
Down
- 1. The thicker part of the crust. Mostly made of granite.
- 2. A force that protects Earth from the Sun's charged particles.
- 3. The outer layer of Earth.
- 5. The lower part of the mantle.
- 7. The crust and upper part of the mantle.
- 12. The line that splits Earth into Northern and Southern hemispheres.
