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A meteor that stikes the Earth's surface is called a _________.
The closest star to the Earth is the __________.
Moons are naturally occurring satellites that orbit planets.
When a ______ gets close to the Sun, its frozen material begins to melt and forms a trail of dust, rock and gas behind it.
Which statement about gravity is true?
gravity causes objects to pull towards one another
gravity causes objects to push away from each other
gravity only takes place between planets
the moon doesn't have any gravity
How long does it take the Earth to make one rotation on its axis?
How long does it take the Earth to orbit around the Sun?