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Seasons
Why we have seasons
| 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 |
| Revolution | The orbit of one object around another object |
| Solstice | When Earths rotation axis is tilted directly toward or away from the sun |
| Equinox | When Earths rotation axis is tilted neither toward or 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 which less of the moons near side 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 moons shadow appears on Earths surface |
| Emit | To remember a fact or situation |
| Waxing crescent | The first lunar phase after the new moon |
| Waning crescent | The final phase moon cycle |
| Waxing gibbous | The phase of the moon that is between the full moon and first quarter |
| Waning gibbous | The phase of the moon that is between the full moon and third quarter |
| Full moon | When the moon appears completely lit |
| New moon | The first lunar phase |
| First quarter | When it occurs halfway between a new moon and full moon |
| Third quarter | When the moon is 3/4 away from full orbit |