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Across
- 1. A substance made of two or more elements bonded together
- 3. A sample of something used for study
- 7. When water changes from a liquid to a gas
- 8. A tiny particle of light energy
- 9. The wearing away of land by water, wind, or ice
Down
- 2. To say what you think will happen based on evidence
- 4. A pattern of energy moving through space or matter
- 5. The steps followed to do an experiment
- 6. The process of getting bigger or more developed