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Across
- 6. A substance that living things need for energy and growth
- 7. A thread-like structure in cells that carries genetic information
Down
- 1. Related to the large plates that make up Earth's surface
- 2. Any living thing such as a plant or animal
- 3. A quick back-and-forth movement
- 4. Two or more atoms joined together
- 5. Anything that takes up space and has weight