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Home Q & A Board Science-Related Homework Help Physics
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symbo symbo
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7 years ago
Which ONE of the following processes was important for melting the entire Earth about 4.6 billion years ago?
A)   Heat released by the condensation of water vapor into liquid water to form the oceans.
B)   Radioactivity, or the spontaneous breaking apart of heavier nuclei into lighter ones
C)   Nuclear fusion, or the combining of lighter nuclei to form heavier ones
D)   Tidal heating of the Earth due to the combined gravitational pulls of the Sun and the Moon
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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discovererdiscoverer
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symbo Author
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6 years ago
Very informative, I appreciate the extra effort
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