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Author Question: ____________ of hydrogen atom nuclei in the core replace the heat the Sun ____________ to keep it in ... (Read 123 times)

jenna1

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on: Jul 27, 2018
____________ 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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Reply #1 on: Jul 27, 2018
Answer to Question 1

a

Answer to Question 2

geocentric


jenna1

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Reply #2 on: Jul 27, 2018
Thanks


nikmaaacs

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Reply #3 on: Jul 27, 2018
Welcome :)


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