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Science Notes

The Terrestrial Planets Notes

TermDefinition
terrestrial planets the four small, dense, rocky planets that orbit closest to the sun.
All terrestrial planets have similar compositions and consist of an outer crust, central core, and a mantle that lies between the crust and core.
One astronomical unit (AU for short) equals the average distance between the sun and Earth (about 150 million kilometers).
Prograde rotation the counterclockwise spin of a planet about its axis as seen from above the planet’s north pole.
Retrograde rotation the clockwise spin of a planet about its axis as seen from above its north pole.
Mercury Facts First planet from the sun. Smallest planet in the solar system. Prograde rotation
Venus Facts Second planet from the sun. Retrograde rotation. Has many volcanoes and craters.
Earth Facts Third planet from the sun. Prograde rotation. Has volcanoes.
Created by: dogie
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