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Across
- 1. All the chemical processes in your body that keep you alive
- 3. The rate at which something speeds up
- 6. The tiny building block that makes up all living things
- 7. The central part of a cell that controls its activity
- 8. Vibrations that travel through the air and are heard by ears
- 9. A pattern of energy moving through space or matter
Down
- 2. When water changes from a liquid to a gas
- 4. A tool that makes far-away things look closer
- 5. A natural solid substance found in the earth