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doit_the_clown doit_the_clown
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7 years ago
What is the source of most of the heavy elements on the Earth and in our own bodies?
A)   Thermonuclear fusion reactions in the cores of massive stars before the supernova phase
B)   Explosive nucleosynthesis during supernova explosions of massive stars
C)   Cosmic ray interactions with hydrogen and helium nuclei in interstellar clouds
D)   Nuclear reactions during the formation of the universe (the Big Bang)
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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hyponoticahyponotica
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7 years ago
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doit_the_clown Author
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7 years ago
Thank you, thank you, thank you!
wyq2651
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This helped my grade so much Perfect
momochiime
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This site is awesome
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