Across
- 6. Earth's closest point to the Sun
- 7. speed needed to escape Earth's gravity.
- 8. based off of stars' position in sky.
- 13. section of mantle that tectonic plates float on it.
- 14. day which the Sun is out the longest in a year.
- 16. line that differentiates the mantle and rust
Down
- 1. low density crust
- 2. dense material sinks, less dense floats.
- 3. Earth's farthest point from the Sun
- 4. path of travel around a celestial body
- 5. day which night lasts the longest in a year.
- 9. Earth's center line.
- 10. crust outer layer of Earth
- 11. equal days and equal nights.
- 12. high density crust
- 15. liquid iron layer; creates magnetic field.