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Across
- 1. A state of matter that spreads to fill any space
- 5. Related to the large plates that make up Earth's surface
- 6. The tendency of an object to stay still or keep moving
Down
- 2. Small pieces of rock and soil carried by water and wind
- 3. A quick back-and-forth movement
- 4. Vibrations that travel through the air and are heard by ears