Across
- 3. When one thing dissolves in another.
- 5. How heavy something is for its size.
- 7. Watery and flowing, no definite shape.
- 11. The power to do things.
- 12. Part of an atom, positive charge.
- 13. energy: Stored energy.
- 14. To become different.
- 15. Like air, invisible, no definite shape.
- 16. How much something weighs.
- 18. change: Changes what something is.
- 19. A special quality.
- 20. Tiny building block of everything.
Down
- 1. Hard and firm, definite shape.
- 2. energy: Energy of movement.
- 4. Part of an atom, negative charge.
- 6. Part of an atom, no charge.
- 8. change: Changes how something looks but not what it is.
- 9. Anything that has mass and takes up space.
- 10. How much space something takes up.
- 17. Things mixed together.