Across
- 3. system the sun and planets
- 7. a positively charged ion
- 8. giant a large reddish star late life
- 10. part of the electromagnetic spectrum that you can see heat through
- 11. waves hold the universe together
- 12. a atom with the same number of protons, neutrons, and electrons
- 14. the change in the illuminated area of one celestial body as seen from another celestial body
- 15. waves part of the electromagnetic spectrum and something that people use to listen to music
- 17. a particle with no charge in the nucleus
- 19. a atom or molecule with a charge
Down
- 1. a positively charged particle in the nucleus of an atom
- 2. any of the nine bodies that orbit the sun
- 4. part of the electromagnetic spectrum but is also a key part of your kitchen
- 5. dwarf a small hot dim star that is leftover center of old star
- 6. a negatively charged ion
- 9. a negatively charged particle in the rings of a atom
- 13. potential of hydrogen
- 14. table a table of the chemical elements arranged in order of atomic number
- 16. the basic unit of a chemical element
- 18. an event that a shadow of one celestial body on another