Across
- 2. water
- 4. happens after a change starts with r
- 9. a very hot planet
- 10. a type of energy that includes motion
- 11. the symbol for argon
- 13. involves wires, power and thunderstorms
Down
- 1. matter and energy
- 3. the colour of a blood cell that delivers o
- 5. substances, properties and reaction
- 6. an air sac inside cells
- 7. the first in the solar system
- 8. gives heat to all things in our universe
- 12. the study of life