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Across
- 2. The force that makes magnets attract or repel
- 5. The tiny building block that makes up all living things
- 6. The force that slows things down when they rub together
- 7. A tiny particle of light energy
Down
- 1. A pattern of energy moving through space or matter
- 3. The slow process of living things changing over many years
- 4. The amount of matter in an object