GK
SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following statements is true about Earth?
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Earth has a moon
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Earth has oxygen
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Earth is not suitable to support life
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None of the above
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Explanation:
Detailed explanation-1: -The atmosphere of Earth is composed of nitrogen (about 78%), oxygen (about 21%), argon (about 0.9%), carbon dioxide (0.04%) and other gases in trace amounts.
Detailed explanation-2: -About half of Earth’s oxygen comes from the ocean; about the same amount is consumed by marine life. The surface layer of the ocean is teeming with photosynthetic plankton. Though they’re invisible to the naked eye, they produce more oxygen than the largest redwoods.
There is 1 question to complete.