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Seasons - Science Language
Axis of Rotation
An imaginary line going from the North Pole to the South Pole. The earth spins on this line.
Earth’s Tilt
The earth’s axis is not straight up and down, instead it leans at a 23.5-degree angle.
Orbit
The path that a planet travels as it goes around the sun.
Phases of the Moon
The changes in the appearance of the moon’s shape during a month, such as:
Full moon
First quarter
Half moon
Last quarter
Reflection
The bouncing of light off of an object. The moon appears to shine because it reflects the sun’s light. 
Revolution
The circling of one object around another object in space. A planet revolves around the sun.  A moon revolves around a planet.
Rotation
When a planet or moon turns all the way around or spins on its axis one time.
Seasons
Due to the tilt of earth as it travels around the sun, we have spring, summer, fall, and winter.
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