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Across
- 1. A natural solid substance found in the earth
- 2. A state of matter that holds its shape
- 4. A chemical change when substances interact
- 5. The invisible force that pulls things toward the Earth
- 6. A curved piece of glass that bends light
Down
- 1. To find the size, amount, or degree of something
- 3. The wearing away of land by water, wind, or ice