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Across
- 1. A state of matter that spreads to fill any space
- 5. The force that slows things down when they rub together
- 6. The speed of something in a given direction
- 8. A form of energy used to power lights and machines
Down
- 2. A group of living things that are the same kind
- 3. The steps followed to do an experiment
- 4. The act of moving or changing position
- 7. A hard solid piece of the Earth made of minerals