Ecology

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Ecology

• E 2.2 Cycles in Nature

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Cycles in Nature

• The amount of water, carbon, nitrogen, oxygen and
  other materials for life are fixed within the
  Earths biosphere.
• Evaporation liquid water changes into water
  vapor
• This occurs from lakes, rivers, plants, exhaling,
  and animal wastes.

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Cycles in Nature

• Condensation water vapor forms tiny droplets
• Water Cycle model that shows the movement of
  water from the surface to the atmosphere and back

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Cycles in Nature

• Nitrogen Cycle transfer of the nitrogen from
  the atmosphere, to the soil, to living organisms,
  an back to the atmosphere
• Nitrogen Fixation bacteria in the soil forms
  nitrogen compounds that plants need
• Most fertilizers contain nitrogen compounds.

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Cycles in Nature

• Carbon Cycle model that shows the movement of
  carbon
• Carbon dioxide is released into the atmosphere.
• Carbon dioxide is taken into plants and supplies
  the carbon that it needs.
• Photosynthesis uses carbon to make sugar and
  respiration uses sugar to make carbon dioxide.

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Cycles in Nature

• Water cycle
• Evaporation
• Condensation
• Nitrogen cycle
• Nitrogen fixation
• Carbon cycle