Across
- 5. what happens to a substance when it is cooled
- 8. the gas that makes up most of the Sun
- 9. mass divided by volume
- 10. force divided by area
- 12. the planet that contains the largest volcano in the solar system
- 13. speed with direction
- 14. the state change from a solid straight to a gas
- 17. what happens to a substance when it is heated
- 19. the steepness of a graph
- 20. a substance that gets less dense as it freezes
Down
- 1. what we think is at the center of our galaxy
- 2. the largest planet in the solar system
- 3. a small ball of ice and rock orbiting the Sun in an elipse
- 4. a dwarf planet that used to be named a planet
- 6. the state change from a gas to a liquid
- 7. the heat transfer that occurs in fluids
- 11. a collection of billions of stars
- 15. the state of matter with the least energy
- 16. the colour of a surface that is bad at absorbing heat
- 18. magnitude only