| A | B |
|---|
| satellite | any object that revolves around another object |
| phases | the different shapes the moon seems to have during a cycle of about 28 days |
| rotation | when a planet rotates on its axis |
| sun | a typical star that is the source of light and heat for the planets in the solar system |
| revolution | the time it takes a satellite to make one complete orbit. It takes Earth 365 days to go around the sun. |
| seasons | short period of climate change in an area caused by the tilt of Earth's axis as it revolves around the sun |
| Earth | The third planet from the sun that is constantly in motion. It rotates on its' axis over a period of 24 hours and completely orbits the moon every 365 1/4 days. |
| orbit | the path an object takes as it moves around another object in space |
| axis | an imaginary line in the center of the Earth that it rotates around. |
| moon | the Earth's satellite, which reflects the sun's light and is seen more clearly at night. |
