4 Subsystems of the Earth Flashcards
What are the four major subsystems?
- atmosphere
- geosphere
- hydrosphere
- biosphere
atmos means?
gas
what separates the atmosphere from outer space?
KARMAN LINE
the most abundant gas in the atmosphere
NITROGEN!
nitrogen 78.1%
oxygen
argon
trace gases
these are ranked from most abundant to least.
TRUE
geo means?
ground
geosphere is?
all rocks, minerals, and soil present in da land
what are the layers of the geosphere?
crust
mantle
core
crust
outermost layer, made up of silicate materials
2 kinds of crust
oceanic and continental
mantle
made up of silicate materials like magnesium and iron
temperature increases with its depth
explain one by one the 2 kinds of mantle
lithosphere- upper mantle + crust and hard and rigid
asthenosphere- hot and rigid at it melts
core
innermost later
made up of iron and nickel
the core is separated by a boundary called?
Bullen Discontinuity
hydrosphere
all forms of water on Earth! oceans, lakes, rivers, marshes
-can be water vapor, ice, or liquid
- 97.5% salt water
-2.5% freshwater