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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 of an obkecy follows as it moves around another object |
Revolution | The orbit of one object around another object |
Solstice | When earths rotation axis is titled directly toward or away from the sun |
Equinox | When earths rotation axis is tilted neither directly toward or away from the sun |
Phase | The lit part of the moon or a planet can be seen from earth |
Waxing phase | The 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 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 |
Recall | To remember a fact or situation |
Reflection | What bounces back from a surface |
Emit | To send out from a source |
Summarize | To |