Across
- 1. — A state of matter that spreads out to fill its container.
- 5. — To change from a liquid into a solid.
- 7. — The mixture of gases surrounding Earth.
- 8. — A state of matter made of charged particles.
- 11. — A state of matter that takes the shape of its container.
- 12. — A solid material that comes from trees.
Down
- 2. — Objects in space that are mostly made of plasma.
- 3. — Frozen water.
- 4. — A light gas often used to fill balloons.
- 6. — A white liquid produced by mammals.
- 9. — A state of matter that keeps its own shape.
- 10. — A giant ball of extremely hot plasma.