Across
- 4. the mechanical process of wearing or grinding something down
- 5. a homogenous mixture
- 9. gravitationally bound system of the Sun and the objects that orbit it
- 10. a compound that can change color depending on conditions
- 12. energy an object has because of it's motion
- 13. large body that orbits around the sun
- 14. makes Earth more livable
Down
- 1. process where water vapor changes it's physical state from a vapor to a liquid
- 2. 2 or more substances that are physically combined
- 3. a water molecule that has gained a hydrogen ion
- 6. compound that increases the number of hydroxide ions when dissolved in water
- 7. small, rocky objects that orbit the Sun
- 8. a huge collection of gas, dust, and billions of stars
- 9. the star at the heart of our solar system
- 11. process where heat energy is transmitted