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Author Question: Why is there virtually no hydrogen and helium present in the atmosphere today? A) These gases ... (Read 73 times)

savannahhooper

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on: Jul 15, 2018
Why is there virtually no hydrogen and helium present in the atmosphere today?
 
  A) These gases were burned off by solar radiation.
  B) The gravitational force of Earth was not strong enough to hold them.
  C) These gases were consumed by rock-forming processes.
  D) Acid rain removed these gases from the atmosphere.

Question 2

Which process is responsible for the oxygen in the atmosphere today?
 
  A) Photosynthesis
  B) Outgassing of volcanoes
  C) Weathering of carbonate rocks
  D) Asteroid impact


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CharlieArnold

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Reply #1 on: Jul 15, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: A


savannahhooper

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Reply 2 on: Jul 15, 2018
Great answer, keep it coming :)

xiazhe

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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