Across
- 4. the sun's magnetic field
- 5. when a star's hydrogen atoms fuse, this is formed
- 8. the attraction of every object in the universe
- 9. what pulls gases together to form a star
- 11. this affects how much gravity between 2 objects
- 12. this affects how much gravity an object has
Down
- 1. when matter is ____, it heats up
- 2. model that says Earth is at the center of our solar system
- 3. model that says the sun is the center of our solar system
- 6. atoms and molecules
- 7. the gas stars are made of
- 10. the amount of matter an object contains