Subsystems of the Earth

• 4 subsystems of the earth

  • Atmosphere
  • Geosphere
  • Hydrosphere
  • Biosphere
• atmosphere consists of

  78% Nitrogen

  21% Oxygen

  1% Other gasses
• atmos - gas
• Sphaira - globe or ball
• Hydro - water
• Hydrosphere - The water in the Earth's oceans, lakes, rivers, and groundwater
• Geosphere - skeleton of the earth
• Geo - Ground
• atmosphere- acts as a blanket, consists of all the gasses on Earth
• The atmosphere extends outwards about 10,000 km from the surface of the earth
• the layers of the atmosphere

  • Troposphere
  • Stratosphere
  • Mesosphere
  • Thermosphere
  • Exosphere
• troposphere is where most weather occurs; 14.5 km
• stratosphere contains the ozone layer which protects us from UV radiation; 14.5 km to 50 km
• mesosphere protects the earth from space debris; 50km to 85 km
• Thermosphere has charged particles affected by the Earth's magnetic field, creating the Auroras; 85km to 600km
• exosphere is the outermost part of the atmosphere that fades into space; 10,000km
• layers of the geosphere consists of:

  • Crust
  • Mantle
  • core
• Crust - outermost layer of the earth; 35-75km
• Oceanic crust - lies beneath the oceanic floors
• continental crust - makes up the continents and is thicker than oceanic crust
• Mantle - made of silicate rocks rich in magnesium and iron; 2900km thick
• Core - inner most layer of the earth; 3400km radius
• is water on earth constantly moving?

  yes
• Where does the warm waters in the tropics move towards?

  the poles
• Biosphere - comprised of all living things
• Bio - Life