| A | B |
|---|
| asteroid | a rocky object smaller than a planet that orbit a star |
| asteroid belt | the region between Mars and Jupiter where most asteroids orbit the sun |
| chromosphere | middle layer of gas in earth's atmosphere |
| comet | a ball of ice, rock, frozen gases, and dust that orbits the sun |
| corona | outer layer of sun's atmosphere |
| greenhouse effect | the warming of the atmosphere because of trapped heat energy from the sun |
| meteor | an asteroid that enters Earth's atmosphere |
| photosphere | layer of sun's atmosphere that gives light |
| planet | a large body in space that orbits a star such as the sun |
| solar system | a star such as the sun, and all the bodies that revolve around it in space |
| star | a glowing ball of hot gasthat makes its own energy and light |
| sunspot | dark area of the sun's surface that gives off less energy than the rest of the sun |
