Which Process Was Important for Melting the Entire Earth About

question 347

Multiple Choice

Which process 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 ocean
• 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 Earth due to the combined gravitational pulls of the Sun and the Moon

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