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Across
- 1. A gas in the air that living things need to breathe
- 5. A pattern of energy moving through space or matter
- 6. The bending of light as it passes from one material to another
- 8. The molecule inside cells that carries instructions for life
Down
- 1. Carefully watching and noting what happens
- 2. A tiny particle of light energy
- 3. An object that attracts iron and some other metals
- 4. Related to the large plates that make up Earth's surface
- 7. A push or pull that can change how something moves