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Planets
Swartz quiz
| Term | Definition |
|---|---|
| gravity | force that attracts 2 objects |
| inertia | an object in motion tends to keep moving in a straight line |
| orbit | path something in space travels around another body |
| revolution | one complete trip around the sun |
| year | one revolution |
| rotation | spinning of the earth |
| day | one rotation of Earth |