L1 /
4
CH1011
THE
EARTH
1)
Geosphere (Core, Mantle)
Crust 0- 40 km r =
2700kg/m3
- O, Si, Al, Fe, Ca
2)
Hydrosphere
Freshwater 0.7% (vol)
Ice 2.0%
Seawater 97.3% r =
1030kg/m3
-
Na+, Cl-, Mg2+, SO42-
3)
Atmosphere
Stratosphere 15- 50 km 9% (mass)
Troposphere 0- 15 km
90% r =
1.3kg/m3
- N2, O2, H2O, Ar