The Study of EarthThe Study of Earth

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Supporting LifeSupporting Life

Earth: only planet known to support Earth: only planet known to support lifelife• TemperatureTemperature• CompositionComposition• Form of waterForm of water

rst.gsfc.nasa.gov

rst.gsfc.nasa.gov

LithosphereLithosphere

Land on EarthLand on Earth• Sedimentary rocks: pieces of rocks Sedimentary rocks: pieces of rocks

compressedcompressed

• Igneous rocks: solidification of liquid Igneous rocks: solidification of liquid rockrock

• Metamorphic rocks: pre-existing rocks Metamorphic rocks: pre-existing rocks changed by heat &/or pressurechanged by heat &/or pressure

HydrosphereHydrosphere

Water on EarthWater on Earth• Salt WaterSalt Water

Mainly oceans and seasMainly oceans and seas If 97% of water on Earth is salt water, and If 97% of water on Earth is salt water, and

Earth is roughly 70% water; how much salt Earth is roughly 70% water; how much salt water makes up the Earth’s surface.water makes up the Earth’s surface.

• Fresh WaterFresh Water 3% of Earth surface3% of Earth surface Lakes, ponds, streams, undergroundLakes, ponds, streams, underground

HydrosphereHydrosphere

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HydrosphereHydrosphere Gulf Oil SpillGulf Oil Spill

• How happenedHow happened• What did BP do to stopWhat did BP do to stop• About how much oil spilledAbout how much oil spilled• Where will/has oil goneWhere will/has oil gone

Map of Oil Spill

• Effects of spill on hydrosphere/environ.Effects of spill on hydrosphere/environ.• Effects we are seeingEffects we are seeing• Other oil spills—outcomes…Other oil spills—outcomes…

HydrosphereHydrosphere Fresh WaterFresh Water

• Aquifer: rocks and soil underground that Aquifer: rocks and soil underground that transports watertransports water

How do you access this water?How do you access this water? Will there always be water in the aquifer?Will there always be water in the aquifer?

• Artesian Well: water flows to surface due Artesian Well: water flows to surface due to pressureto pressure

OutOut• Answer pg.7 #3 in book: The amount of salt in salt dissolved in Answer pg.7 #3 in book: The amount of salt in salt dissolved in

water of salt-water lakes is often greater than the amount of salt water of salt-water lakes is often greater than the amount of salt in ocean water. Why do you think this is true?in ocean water. Why do you think this is true?

AtmosphereAtmosphere

Composition:Composition: .04% CO.04% CO22, 21% O, 21% O22, 78% N, 78% N22, .06% other, .06% other

Photosynthesis:Photosynthesis: COCO22 + H + H22O +O +sun energy sun energy OO2 2 + C+ C66HH1212OO66

Respiration:Respiration:• OO22 + C + C66HH1212OO6 6 CO CO2 2 + H+ H22O O

AtmosphereAtmosphere

SURFACE OF EARTH http://www.aerospaceweb.org/question/atmosphere/q0112.shtml

BiosphereBiosphere Most life on Earth: -500m to +6km Most life on Earth: -500m to +6km

from sea level from sea level

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