The spin of a body on its axis
The motion of a body that travels around another body in space; one complete trip along an orbit
One of the highly dense planets nearest to the sun; Mercury, Venus, Earth, and Mars
A planet that has a deep, massive atmosphere, such as Jupiter, Saturn, Uranus, or Neptune.
A small body that gives off gas and dust as it passes close to the sun; a typical comet moves in an elliptical orbit around the sun and is made of dust and gases
A bright streak of light that results when a meteoroid burns up in Earth’s atmosphere
A relatively small, rocky body that travels through space
A meteoroid that reaches Earth’s surface without burning up completely
A small, rocky object that orbits the sun; most asteroids are located in a band between the orbits of Mars and Jupiter
Which of these is a gas giant?
Which of these is a terrestrial planet?
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