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Across
- 2. The remains of a plant or animal from long ago preserved in rock
- 4. A test done to discover something new
- 6. The natural home of an animal or plant
- 7. A form of energy that makes things warm
- 8. A hard solid piece of the Earth made of minerals
- 9. To study something carefully to understand it
- 10. The force that slows things down when they rub together
Down
- 1. The breaking down of rocks by weather, water, and living things
- 3. A group of living things that are the same kind
- 5. When water changes from a liquid to a gas