| A | B |
|---|
| solar system | the sun and all that orbits it |
| rotates | turns |
| atmosphere | layers of air around the earth |
| gravity | force that pulls objects toward's a planet's center |
| solar flare | giant storms on the sun's surface |
| sun spots | areas that are cooler than the rest of the sun |
| inner planets | the four planets closest to the sun |
| asteroids | chuncks of rock and metal in orbit around the sun |
| asteroid belt | the area between the inner and outer planets filled with thousands of asteroids |
| year | the time it takes for a planet to go all around the sun |
