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Across
- 2. A material that does not let electricity or heat pass through easily
- 5. A thread-like structure in cells that carries genetic information
- 7. The wearing away of land by water, wind, or ice
Down
- 1. The amount of space something takes up
- 3. A substance that living things need for energy and growth
- 4. A push or pull that can change how something moves
- 5. The part of an experiment that stays the same for comparison
- 6. A gas in the air that living things need to breathe