gbrightwell gbrightwell
  • 14-01-2019
  • SAT
contestada

Earth's atmosphere is unique among the planets and is able to support life because it contains a large amount of ___________. A) oxygen B) helium C) methane D) carbon dioxide

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ivana2103
ivana2103 ivana2103
  • 14-01-2019
Oxygen. Most living beings need air to breathe (and therefore live), and air (our atmosphere) contains about 21% oxygen.
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owentout
owentout owentout
  • 16-01-2019
OXYGEN!!! What a great thing it is...
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