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Across
- 1. The tendency of an object to stay still or keep moving
- 5. A pattern of energy moving through space or matter
- 7. When a gas cools and turns back into a liquid
- 8. The central part of a cell that controls its activity
Down
- 2. The bending of light as it passes from one material to another
- 3. When light bounces off a surface like a mirror
- 4. An object that attracts iron and some other metals
- 6. A tiny particle of light energy