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Seasons
Why do we have season?
| Term | Definition |
|---|---|
| Rotation | The spin of an object around its axis. |
| Rotation axis | The line on which an object rotates. |
| Orbit | The path an object follows as it moves around another object. |
| Solstice | The orbit of one object around another object.when earths rotation axis is tilled directly toward or away from the sun |
| Equinox | When earth’s rotation axis is tilled neither toward nor away from the sun |
| Phase | The lit part of the moon or a planet that can be seen from earth. |
| Waxing phase | Phases of the moon during which more of the moons near side is lit each night |
| Waning phase | Phases of the moon during which less of the moons near slide is lit each night . |
| Umbra | The central, darker part of a shadow where light is totally blocked. |
| Penumbra | The lighter part of a shadow where light is partially blocked . |
| Solar eclipse | An occurrence during which the moon’s shadow appears on earth surface. |