Across
- 6. half of the earth, divided by the equator.
- 9. the degree of compactness of a substance
- 11. a changeable thing in the experiment.
- 12. the regions of the surface, atmosphere, and hydrosphere of the earth.
- 13. sticking two small atomic nuclei together.
- 15. the largest gas giant in the milky way.
- 19. a common, hard crystalline.
- 21. electromagnetic radiation with wavelengths shorter than visible light.
- 23. protects the atmosphere from harmful ultraviolet rays.
- 24. used to represent independent variable
- 25. An angle that a planet rotates on.
Down
- 1. the appearance of a mineral surface when light is reflected.
- 2. continuous force on an object.
- 3. natural resources that don't lessen.
- 4. 365 days around the sun.
- 5. when heat is transferred.
- 7. a mountain with a crater where lava erupts.
- 8. being worn down by exposure to the elements.
- 10. rocks formed by air or water.
- 14. the remains or impression of a prehistoric organism in the petrified form.
- 16. the time or date at which the sun crosses the celestial equator 2 times year.
- 17. a system of billions of stars, planets, and asteroids, held together by gravity.
- 18. asteroids and comets behind Neptune.
- 20. a chemical element with the atomic number 30.
- 22. makes up earths crust and mantle.