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Earth, Moon, and Sun

Unit 6 Vocabulary

TermDefinition
star at the center of our solar system; sphere of glowing gases; greatest mass and greatest gravity in the solar system Sun
third planet from the Sun; has liquid water and an atmosphere that allow life to exist Earth
Earth’s only natural satellite; diameter is about 1/4 the diameter of Earth; gravity is 1/6 the gravity of Earth Moon
layer of air that surrounds the Earth and is made of a mixture of gases atmosphere
imaginary line about which an object rotates axis
combination of substances that make up the whole object; what an object is made of composition
the path that one object in space follows as it revolves around another object in space orbit
one orbit of an object in space around another object in space, such as a planet around the Sun or a moon around a planet revolution
the spinning of a planet, Moon or other object on its axis rotation
the path that the Sun appears to take across the sky each day from east to west apparent movement
movement opposite of the hands of a clock counter clockwise
landform caused by the impact of a meteorite that leaves a circular depression in the surface craters
a series of events that are repeated in the same order cycle
cycle caused by the rotation of Earth on its axis; 24 hours day/night cycle
a straight line passing through the center of a circle or sphere diameter
force by which a planet or other body draws objects toward its center gravity
a natural characteristic of the surface, such as landforms, liquid water or ice physical features
a celestial body orbiting another body in space satellite
a dark area or shape produced when a body comes between light rays and a surface shadow
Created by: Plainview 5th
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