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Lesson 1: What's Earth's Place in the Universe?
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Gravity
Terms in this set (8)
Diameter
A straight line across the widest point of a circle or sphere.
Gravity
The force that attracts all masses of matter toward each other.
Model
A representation of a thing or concept that is useful in aiding understanding of the real thing or concept.
Scale Model
A physical representation of an object which is larger or smaller than the actual object but maintains the proportions of the sizes of the object's parts.
Solar System
The planets, the moons, and the other smaller bodies that orbit the Sun.
Star
A huge ball of gas, held together by gravity, that gives off light and other energy.
Sun
The star at the center of the solar system, around which Earth orbits.
System
A group of related parts that work together.
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