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Across
- 3. To find the size, amount, or degree of something
- 5. Two or more atoms joined together
- 7. To study something carefully to understand it
Down
- 1. A pattern of energy moving through space or matter
- 2. Facts that show something is true
- 4. A hard solid piece of the Earth made of minerals
- 6. A gas in the air that living things need to breathe