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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 roatates |
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 towards or away from the sun |
Equinox | When earth’s rotation axis is tilted neither towards 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 moon’s near side is lit each night |
Waning phase | phases of the moon during which less of the moon’s near side is lit each night |
Umbra | The central, darker part of a shadow were light is totally blocked |