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Across
- 1. A state of matter that holds its shape
- 3. The central part of a cell that controls its activity
- 4. The passing of traits from parents to their children
- 7. The process of getting bigger or more developed
- 8. When a gas cools and turns back into a liquid
Down
- 2. How tightly packed the matter is in something
- 5. The wearing away of land by water, wind, or ice
- 6. A mountain with an opening that can erupt hot lava