Venus and Earth Probably Formed with Similar Amounts of Carbon

question 95

Multiple Choice

Venus and Earth probably formed with similar amounts of carbon dioxide in their secondary atmospheres.Which of the following is true?

• A) The majority of Earth's carbon dioxide escaped into space because of its hotter temperature, whereas Venus's carbon dioxide remains gravitationally bound to Venus.
• B) The majority of Earth's carbon is now bound up in rock, whereas Venus's remains in its atmosphere.
• C) Earth lost more of its secondary atmosphere because it was bombarded by more planetesimals than Venus.
• D) The majority of Earth's carbon was absorbed by plants during photosynthesis.
• E) Earth and Venus still have equal amounts of carbon dioxide in their atmospheres.

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