Across
- 2. layer of the atmosphere that contains the ozone layer
- 7. hottest layer of the atmosphere
- 8. layer of atmosphere that contains humans and weather
- 9. a huge ball of gas that shines because of nuclear fusion
- 11. how bright a star appears from Earth
- 12. hot bursts of gas that shoot up from the Sun and form loops
- 15. the actual brightness of a star
- 17. fusion combining of nuclei that produces a massive burst of energy
- 18. outermost layer of the atmosphere that extends into outer space
- 19. heat transfer by direct contact
Down
- 1. layer of the atmosphere that burns up meteoroids
- 3. bright visible surface of the Sun
- 4. thin layer of gas that surrounds the Earth
- 5. Radiation occurs in this zone of the Sun
- 6. the outermost layer of the Sun that can only be seen during an eclipse
- 10. heat transfer by waves
- 13. cooler spots on the Sun
- 14. heat transfer through a fluid
- 16. The innermost part of the Sun