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Question
Carbon dioxide dominates the atmospheres of Venus and Mars, but on Earth most of it lies underground as ________.Answer
This answer is hidden. It contains 27 characters.
Related questions
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If the inflation theory is correct, the geometry of the universe is flat and Euclidean.
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In the habitable zone, surface water must be at least partially ________ in phase.
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An extraterrestrial observer would pick up the strongest radio signals when
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Most SETI searches are done at
A) X-ray wavelengths.
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In Drake's equation, which of the following is the closest estimate for the number of stars that are formed in the Milky Way Galaxy?
A) a star a day
B) a star a month
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Which type of molecules, vital to our life, were found to have survived a fiery descent to Earth on meteorites?
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B) DNA
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How long ago did multicellular life forms appear in the fossil record?
A) 4.5 billion years ago
B) 3.8 billion years ago
C) one billion years ago
D) 63 million years ago
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What important molecules of life did Miller and Urey brew up?
A) RNA
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Thanks to the far-flung Voyager and Pioneers, knowledge of our presence has now spread out over 30 light years.
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The water hole lies between 18 and 21 cm in wavelength in the radio spectrum.
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Of the billions of possible combinations of atoms into organic molecules, only about 1500 actually occur.
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Earth-like planets have been observed outside our solar system orbiting in the habitable zone.