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Author Question: What are the abundant elements that make up the composition of Earth's present-day atmosphere? A) ... (Read 63 times)

mcmcdaniel

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on: Aug 22, 2018
What are the abundant elements that make up the composition of Earth's present-day atmosphere?
 A) oxygen and carbon dioxide
  B) nitrogen and oxygen
  C) carbon dioxide, nitrogen, and hydrogen
  D) hydrogen and oxygen

Question 2

Sound and light waves bend because they travel at different speeds in different media.
  Indicate whether the statement is true or false


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efwsefaw

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Reply #1 on: Aug 22, 2018
Answer to Question 1

B

Answer to Question 2

True


mcmcdaniel

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Reply 2 on: Aug 22, 2018
Excellent

samiel-sayed

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Reply 3 on: Yesterday
Gracias!

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