Across
- 4. The state of shining by reflecting light
- 8. Heat moving in a circular motion
- 11. The procces of wearing or being worn by long exposure to the atmosphere
- 13. A belt located beyond Neptune primarily composed of icy bodies
- 14. The principle or horizontal axis of a system of coordinates
- 17. The sum of all ecosystems
- 19. A form of electromagnet radiation with wave lengths
- 21. A half of a sphere
- 23. A highly reactive gas composed of three oxygen atoms
- 24. Massive rigid slabs of Earth's lithosphere which causes earth quaks
- 25. Physical force exerted on or against an object by something in contact with
Down
- 1. A hard white or colorless mineral
- 2. A type of variable that's variation does not depend on that of another
- 3. This is the largest planet in our solar system
- 5. Capable of being renewed
- 6. A mountain or hill typically conical having a crater with lava in it
- 7. The degree of compactness
- 9. When the sun crosses the celestial equator
- 10. Formed from the accumulation and cementation of sediments
- 12. A system of millions or billions of stars
- 15. The process which two light atomic nuclei combine
- 16. The time it takes earth to make one revolution around the sun
- 18. The chemical element of atomic number 30
- 20. The angle between a planets rotational axis
- 22. The remains of an organism with skeletal structure