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Author Question: ____________ of hydrogen atom nuclei in the core replace the heat the Sun ____________ to keep it in ... (Read 125 times)

jenna1

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____________ of hydrogen atom nuclei in the core replace the heat the Sun ____________ to keep it in equilibrium.
 
  a. Nuclear fusion reactions; loses into space
  b. Nuclear fusion reactions; gains from empty space
  c. Chemical reactions; loses into space
  d. Chemical reactions; gains from empty space
  e. Nuclear fission; loses into space

Question 2

Ptolemy formulated a(n) ___________________ _ model of the solar system to predict positions of the Sun, Moon, and planets.
 
  Fill in the blank(s) with correct word



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nikmaaacs

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Answer to Question 1

a

Answer to Question 2

geocentric





 

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