The 4 hemispheres

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18 Terms

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Earth has 4 spheres that must work together to support life.

These spheres are the lithosphere (land), hydrosphere (water), atmosphere (air), and biosphere (living things) that interact and sustain ecosystems.

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Atmosphere

A layer of gases(air)surrounding Earth, held in place by gravity

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Troposphere(6-12km)

the lowest layer of the atmosphere where weather occurs and contains most of the atmosphere's mass.

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Stratosphere(12-50km)

The second layer of the atmosphere above the troposphere. contains the ozone layer and protects us from harmful UV rays.

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Mesosphere(50-80km)

The third layer of the atmosphere, located above the stratosphere. It burns up meteors and dust.

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Thermosphere(80-40km)

The fourth layer of the atmosphere, located above the mesosphere. It absorbs lots of harmful UV rays.

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Exosphere(480+km)

The outermost layer of the atmosphere, extending from the thermosphere to about 10,000 km above the Earth's surface. It’s where the atmosphere exist into space.

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Biosphere

All living organisms and their interactions with their environment, including ecosystems and biomes.

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Sustainability

The ability to maintain the earth’s resources so that future generations can meet their needs too.

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Carbon footprint

The amount of greenhouse gases produced by human actions.

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Lithosphere

Rigid outer layer of the earths crust and upper mantel compses of rock and soil.

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Three types of rock

Sedimentary

Igneous

Metamorphic

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Sedimentary rock

Formed from layers of sediment

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Igneous rock

Formed from cooled magma or lava

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Metamorphic rock

Formed form existing rock changed by heat and pressure

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Hydrosphere

All the water on earth in solid, liquid or gas form

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The Hydrosphere drives the water cycle

Evaporation, condensation,precipitation, collection

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Transpiration

Process where plant release water vapor into thr air through their leaves