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Across
- 1. How often something happens in a given time
- 3. A state of matter that holds its shape
- 4. The part of an experiment that stays the same for comparison
- 6. A tool that makes far-away things look closer
- 7. A form of energy that allows us to see
Down
- 2. Facts that show something is true
- 5. A form of energy that makes things warm