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2
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6
Across
- 3. The distance between one wave peak and the next
- 4. Vibrations that travel through the air and are heard by ears
- 5. A form of energy that allows us to see
- 6. The upward force that makes things float in water
Down
- 1. An object that attracts iron and some other metals
- 2. To sort things into groups based on their features