Across
- 1. how waves move
- 3. how loud object is
- 5. hold the plants stars and galixies
- 7. when light gets absorbed
- 11. what scientist use to measure space
- 12. measurement from the sun to earth
- 13. the top for a wave
- 14. how bright a object is
Down
- 2. range of em radiation
- 4. how far/close waves are
- 6. how light is changed
- 8. holds planets and stars
- 9. the bottom of a wave
- 10. when light bounces off a substance