Across
- 3. hot material rises and cooler material sinks
- 6. area of the sun where nuclear fusion occurs
- 9. occurs in the core of the sun
- 10. cooler areas on the sun that appear darker
- 14. what happens to light in water
- 16. these rays have the most energy and shortes wavelenght
- 17. stars are brighter than red stars
- 18. heat and light travel through open space
- 19. how many times a wave passes a point in a given time
- 20. electromagnetic waves travel through empty______
Down
- 1. what happens to light in a mirror
- 2. objects absorb almost all light
- 4. from rest to crest
- 5. mechanical waves travel through
- 7. not used to determine a star's apparent magnitude
- 8. from crest to crest on a wave
- 11. this light has more energy and can harm skin
- 12. objects reflect almost all light
- 13. speed of sound waves______moving from gas to solid
- 15. surface temperature of a star is indicated by