earth subsyste Flashcards
necessary requirements for life
water and heat
first photosynthetic organism
cyanobacteria
possible sources of water
volcanism and icy meteors
what makes the earth habitable
earths distance form the sun and holds water in its liquid form
sources of heat
earth and sun
time it takes to turn around its axis (24 hours) earth’s tilt 23.5 degrees
rotation
time it takes to turn around its elliptical orbit (365 1/4 days)
Revolution
Why is earth a closed system
amount of matter is fixed
Changes within one subsystem eventually causes changes in others
Solid Earth
Geosphere
loose particles of rocks that are found blanketing the surface of earth
regolith
Solid and rigid outer layer that includes the crust and the uppermost part of the mantle
Lithosphere
Solid but mobile part of mantle
Asthenosphere
totality of earth’s water including the cryosphere
hydrosphere
Mixture of gases that surround the planet
Atmosphere
Amount of nitrogen
78%
amount of oxygen
21%
amount of argon
0.9%
mixture of gases present in the atmosphere
nitrogen Oxygen Argon Carbon Dioxide Water Vapor
lowest layer of the atmosphere, where weather takes place
troposhere
Where Ozone layer ids found , airplane is in this layer
Statosphere
Coldest layer, where meteors are present
Mesosphere
Ionosphere, satellite is put at this level
Thermosphere
6,200 miles from the ground
Exosphere
All living organisms on the planet, even organic matter that has not yet decomposed
Biosphere
pathways by which chemical substances move through both biotic(living) and abiotic (non-living) components of the earth
Biogeochemical cycle
