Earth is the third planet from the Sun and the only known planet that supports life., True, False, Mercury has extreme temperature changes because it is very close to the Sun., TRUE, FALSE, Mars has a thick atmosphere that traps too much heat., TRUE, FALSE, Liquid water covers about 71% of Earth’s surface., TRUE, FALSE, Earth’s atmosphere protects living things from harmful solar radiation., TRUE, FALSE, Venus is too hot because of its thick carbon dioxide atmosphere., TRUE, FALSE, Gravity on Earth helps hold the atmosphere, water, and living organisms in place., TRUE, FALSE, Mars can easily support life because it has liquid water on its surface., TRUE, FALSE, Earth’s balanced greenhouse effect helps regulate temperature and support life., TRUE , FALSE, Other planets like Mercury, Venus, and Mars have all the same life-supporting conditions as Earth., TRUE , FALSE.

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