The Earth is the only planet known to support life. Which of the following is a major contributing factor to the Earth's ability to support
life?
A) The Earth has a magnetic field with north and south poles
B) The earth has an iron-rich core and is made mostly of rock
C) The Earth orbits the Sun and is orbited by the moon
D) The Earth is surrounded by a layer of air that includes oxygen
Answers: 3
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The Earth is the only planet known to support life. Which of the following is a major contributing f...
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