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EARTH SCIENCE: THE MASSES OF EARTH'S COMPONENTS
1) In terms of mass, how does the biosphere rank as a component
of this planet? Here are the approximate numbers in kilograms:
mantle: 4.1 x 10^(24) kilograms
core: 1.9 x 10^(24)
continental crust: 1.6 x 10^(22)
oceanic crust: 7.0 x 10^(21)
hydrosphere: 1.4 x 10^(21)
atmosphere: 5.3 x 10^(18)
biomass: 1.0 x 10^(15)
2) And in terms of crust composition? Where does carbon rank in
crust composition in parts per million? Carbon, in fact, is
almost a trace element. Here are the approximate numbers, Earth's
crust composition in parts per million:
O 456,000
Si 273,000
Al 83,600
Fe 62,600
Ca 46,600
Mg 27,640
Na 22,700
K 18,400
Ti 6,320
H 1,520
P 1,120
F 544
S 340
C 180
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