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Across
- 2. A sample of something used for study
- 3. The force that slows things down when they rub together
- 6. Facts that show something is true
- 8. The process of getting bigger or more developed
Down
- 1. Small pieces of rock and soil carried by water and wind
- 4. A pattern of energy moving through space or matter
- 5. To say what you think will happen based on evidence
- 7. The wearing away of land by water, wind, or ice