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Seasons

Why do we have seasons?

TermDefinition
rotation The spin of an object around its axis .
Orbit The path an object follows as it moves around another object .
Rotation axis The line on which an object rotates .
Revolution The orbit of one object around another object .
Solstice When Earth’s rotation axis is tilted directly toward or away from the sun .
Equinox When Earth’s rotation axis is tilted 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 moon’s near side is lit each night .
Waning phase Phases of the moon during which less of the moon’s side is lit each night .
Umbra The central , darker part of a shadow where light is partially 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’s surface.
Created by: user-1871084
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