Compare Earth and Mars.
There are eight planets in our solar system. The four closest to the Sun are known as the terrestrial planets because they have rocky surfaces. Of the others, two are gas giants and two are ice giants.
Answer and Explanation:
Mars and Earth are both terrestrial planets, so they have a hard, rocky, crust. Scientists know that Earth has a crust, mantle, and a solid inner...
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from CLEP Natural Sciences: Study Guide & Test PrepChapter 9 / Lesson 12