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Across
- 4. A substance that living things need for energy and growth
- 5. A thread-like structure in cells that carries genetic information
- 7. The band of colors formed when white light is split
Down
- 1. The part of an experiment that stays the same for comparison
- 2. The smallest piece of matter that makes up everything
- 3. A hard solid piece of the Earth made of minerals
- 6. Anything that takes up space and has weight