Across
- 3. speed in a direction
- 5. center of the star
- 6. distance when you are from start
- 8. atom with negative or positive charge
- 10. mass times velocity
- 12. positive charge
- 14. positive charge
- 17. negative charge
- 18. the visible layer
- 19. suns particles and earths atmosphere
Down
- 1. 2 objects rubbing on each other
- 2. outer layer of the sun
- 4. item on the periodic table
- 7. negative charge
- 8. atom that has the same protons and neutrons
- 9. flare outburst of radiation from the sun
- 11. no charge
- 13. the center when the protons and neutrons
- 15. force that pulls objects to a center
- 16. atoms are fused to make new atoms