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Across
- 1. A state of matter that spreads to fill any space
- 5. The distance between one wave peak and the next
- 6. The central part of a cell that controls its activity
- 7. To write down information for later use
Down
- 2. The band of colors formed when white light is split
- 3. A pattern of energy moving through space or matter
- 4. To find the size, amount, or degree of something