science 10.4 & 10.6

4. The visible surface of the sun
5. The gas and dust that forms a cloud around the nucleus of a comet
9. Solar Wind, A comet’s trail grows smaller as the comet travels away from the sun because this
10. and Gas, The components of a comet's trail that separate because they react differently with solar wind
13. Belt, The ring containing objects that resemble comet nuclei and orbit farther from the sun than Neptune does
14. Temperature, The primary factor that determines a star’s color
15. Comet, The comet with the shortest period
16. The feature of the sun’s surface that is the same as a solar prominence but viewed from a different angle
17. Dwarfs, The group of small dim stars outside the main sequence
18. The phenomenon that might be seen when the Earth passes through a comet's trail of small space rocks
19. The dark patches on the sun caused by the sun’s magnetic field

1. and Size, The two main characteristics that influence a star’s absolute magnitude
2. Parallax, Half of the angle that a star appears to move on the celestial sphere when viewed from opposite sides of space
3. The larger-than-normal convection cells that cover the sun’s surface and last from 12-24 hours
6. A small chunk of rock or metal that is traveling through Earth’s atmosphere and glows due to adiabatic heating.
7. Belt, The group of asteroids located between the orbits of Mars and Jupiter
8. Halley, The astronomer correctly calculated the return of a comet in 1682
11. Region, The thin layer of the sun’s atmosphere that releases ultraviolet radiation
12. A rocky or metallic object that gets too close to the atmosphere and lands on the Earth’s surface
14. The characteristic that makes giants and supergiants extremely bright