| Term | Definition |
|---|---|
| Rotation | The act of spinning or turning on an axis |
| Axis | An imaginary line that runs from a planet's north pole to its south pole on which a planet rotates. |
| Day | Length of time it takes for a planet to rotate once on axis |
| Year | Length of time it takes for a planet to make one revolution around the sun |
| Revolution | The act of moving in a curved path or orbit around another object |
| Oribit | Path an object takes when it revolves around another object |
| Ellipse | An enlonged circal; ovel |
| Time Zone | One of the 24 standard zones into which earth is divided, corresponding to the 24 hour day! |
| Horizen | The point where the sky seems or appears to meet the land, ground, and earth |
| Sunrise | When aney part of the sun's disk becomes viable over the horizen |
| Sunset | When the suns disk completely disappears behind (does not have to be complety the horizen |
