Across
- 1. a basic unit of an element
- 3. matter that holds its shape
- 5. chemical elements on Earth
- 8. when a liquid becomes a gas
- 9. all substances around us
- 10. when a solid becomes part of a liquid
- 11. when a liquid becomes a solid
- 14. when a solid becomes a gas
Down
- 2. a group of atoms
- 4. matter that takes the shape of the container
- 6. when 2 or more elements combine
- 7. when a gas becomes a solid
- 12. matter that fills up a space
- 13. ionised gas
- 15. when a solid becomes a liquid