Across
- 3. the point where an object is closest to the sun
- 6. the movement of the planet around the sun
- 9. materials in a planet separating in layers
- 11. where an object is furthest from the sun in orbit
- 13. when the path of the sun is farthest south
- 14. the circulation of a celestial body around another
Down
- 1. the change in the direction of Earth's axis
- 2. the largest section of the earth
- 4. when the earth makes one rotation on its axis relative to the sun
- 5. the innermost layer of the Earth
- 7. an element found in the earth's core
- 8. an imaginary line around the middle of a planet
- 10. the minimum velocity needed to escape Earth's magnetic pull
- 12. the solid, outer part of Earth