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Across
- 3. The path water takes as it moves between Earth and sky
- 5. A glass container used in science experiments
- 7. A sample of something used for study
Down
- 1. How often something happens in a given time
- 2. The breaking down of rocks by weather, water, and living things
- 4. The wearing away of land by water, wind, or ice
- 6. The amount of matter in an object