Across
- 3. Part of the mantle where rocks flow
- 5. Half of the Earth
- 7. Earth’s rigid outer layer
- 9. Earth’s 23.5-degree feature
- 13. Separation of layers in a planet
- 15. Imaginary lines running east to west
- 16. Imaginary lines running north to south
- 17. Elliptical path in space
Down
- 1. Opposite of perihelion
- 2. earths outer most layer
- 4. Movement of a planet around a star
- 6. Earth layer named after a Croatian scientist
- 8. Imaginary line around the Earth
- 10. Layer between Earth's crust and core
- 11. Causes day and night on Earth
- 12. Wobbling motion of Earth's axis
- 14. Heavy element formed in supernovae