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