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Author Question: The very first stars in the universe were made of A) hydrogen and helium. B) hydrogen and helium, ... (Read 773 times)

sheilaspns

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The very first stars in the universe were made of
 
  A) hydrogen and helium. B) hydrogen and helium, 10 heavy elements.
  C) hydrogen and helium, 0.1 heavy elements. D) hydrogen and helium, 2 heavy elements.

Question 2

The ozone layer blocks much of the Sun's ________ radiation.
 
  A) gamma ray B) X-ray C) radio D) infrared E) ultraviolet



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mcomstock09

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Answer to Question 1

A

Answer to Question 2

E





 

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