| Term | Definition |
|---|---|
| Rotate | to move or turn in a circle |
| Axis | a straight line about which a body or a geometric figure rotates or may be supposed to rotate |
| Day | the period of rotation of a planet (as earth) or a moon on its axis |
| Night | the time of darkness between one day and the next |
| Revolve | to turn around a center point or line |
| Seasons | is a division of the year, marked by changes in weather, ecology and hours of daylight. |
| Orbit | a path described by one body in its revolution about another |
| Northern hemisphere | the half of the earth that lies north of the equator |
| Daylight hours | the hours when it is daylight |
