The Water Cycle

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The Water Cycle
HOME
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Precipitation

• Water that has condensed in the air forms clouds
• Drops fall to Earth and accumulate in oceans and
  lakes

Back to the Water Cycle
Using Water
Evaporation
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Using Water

• Plants and animals need water to live
• Water is pulled from bodies of water or from the
  ground (groundwater)

Back to the Water Cycle
Waste
Precipitation
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Waste

• Plants return water to environment through
  transpiration
• The evaporation of water from their leaves
• Animals return water to ground and bodies of
  water through urine

Back to the Water Cycle
Evaporation
Using Water
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Evaporation

• Water from oceans, lakes, and other bodies of
  water re-enters the atmosphere through evaporation

Back to the Water Cycle
Precipitation
Waste
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The Carbon Cycle
HOME
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Photosynthesis

• The process where plants use CO2 from the
  atmosphere to make high-energy carbon molecules
  (glucose)

Respiration Gas Exchange Pollution
Back to the Carbon Cycle
Metabolism
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Metabolism

• Organisms use high energy carbon molecules for
  growth

Respiration
Back to the Carbon Cycle
Waste
Photosynthesis
Decomposition
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Respiration

• CO2 is released through aerobic respiration
  (breathing, for example)

Back to the Carbon Cycle
Metabolism Decomposition
Photosynthesis
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Waste

• Carbonates released into ground and water supply

Metabolism Photosynthesis Decomposition
Back to the Carbon Cycle
Gas Exchange
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Gas Exchange

• CO2 is exchanged between the air and water

Back to the Carbon Cycle
Photosynthesis
Waste
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Decomposition

• When organisms die and decay, the carbon
  molecules in them enter the soil.
• Microorganisms break down the molecules,
  releasing CO2

Back to the Carbon Cycle
Photosynthesis
Metabolism
Pollution
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Pollution

• Remains of dead organisms are converted into
  fossil fuels (over millions of years!)
• Combustion of fossil fuels and wood releases CO2

Back to the Carbon Cycle
Using Water
Metabolism
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The Nitrogen Cycle
HOME
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Nitrogen Fixation

• Lightning and bacteria convert atmospheric
  nitrogen into nitrates (NO3) and ammonia (NH3)

Back to the Nitrogen Cycle
Protein Production
Return to Atmosphere
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Protein Production

• Plants use nitrogen molecules to make amino acids
  

Back to the Nitrogen Cycle
Nitrogen Fixation
Conversion
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Conversion

• Consumers convert plant proteins to animal
  proteins

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Waste
Protein Production
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Waste

• Decomposers break down animal and plant matter
  into nitrogen compounds

Back to the Nitrogen Cycle
Return to Atmosphere Pollution
Conversion
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Return to Atmosphere

• Nitrogen compounds break down into gas and return
  to air

Back to the Nitrogen Cycle
Nitrogen Fixation
Waste
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Runoff

• Runoff of nitrates in fertilizers enters
  groundwater and soil

Back to the Nitrogen Cycle
Protein Production
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Pollution

• Nitrous Oxide from burning fossil fuels falls as
  Nitric Acid in rainwater

Back to the Nitrogen Cycle
Waste
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Time to switch it up!!!
Stand up to stretch, but dont distract others
around you!!! Click on the link below to learn
about the Phosphorous Cycle o) http//www.sumana
sinc.com/webcontent/animations/content/phosphorous
cycle.html