Across
- 6. chemical reaction in the sun's core to create photons
- 8. the movement of one object around another
- 9. layer of the sun light comes from
- 11. similar to mass but affected by gravity
- 12. center of our solar system; most mass so most gravity
- 13. a force that slows a falling object
- 14. the direction the earth revolves the sun
- 17. sun centered solar system
- 18. cooler dark patches on the surface of the sun
Down
- 1. if distance increases then gravity _____
- 2. man who first studied gravity
- 3. an invisible pull between two objects
- 4. how much matter is in an object
- 5. an inverse factor of gravity
- 7. earth centered solar system
- 10. the outside of an area affected by air
- 15. if mass increases then gravity _____
- 16. layer of the sun where the color comes from