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The current terrestrial biomass of Earth contains about 4.5x10^15 of complex carbon compounds. If the average yearly rate of deposition of carbon compounds from meteorites is approximately 6x10^5 , about how long would it take for carbonaceous chondrites to deliver a total mass equal to our present biosphere?

 Dec 12, 2020
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(4.5 x 1015 ) / ( 6 x105) =  ......... years

 Dec 12, 2020

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