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Across
- 3. A sample of something used for study
- 4. How often something happens in a given time
- 7. When light bounces off a surface like a mirror
- 8. A glass building for growing plants or the warming effect on Earth
Down
- 1. The process of making new living things
- 2. A form of energy that allows us to see
- 5. A form of energy that makes things warm
- 6. An object that attracts iron and some other metals