Transcript The Water Cycle

The Water Cycle
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Precipitation
• Water that has condensed in the air
forms clouds
• Drops fall to Earth and accumulate
in oceans and lakes
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the
Water
Cycle
Evaporation
Using Water
Using Water
• Plants and animals need water to
live
• Water is pulled from bodies of
water or from the ground
(groundwater)
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the
Water
Cycle
Precipitatio
n
Waste
Waste
• Plants and animals return water to
environment through transpiration
• Animals return water to ground and
bodies of water through urine
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the
Water
Cycle
Using Water Evaporation
Evaporation
• Water from oceans, lakes, and other
bodies of water re-enters the
atmosphere through evaporation
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the
Water
Cycle
Waste
Precipitation
The Carbon Cycle
HOME
Photosynthesis
• Plants use CO2 from the atmosphere
to make high-energy carbon
molecules
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the
Carbon
Cycle
Respiration
Gas Exchange Metabolism
Pollution
Metabolism
• Organisms use high energy carbon
molecules for growth
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the
Carbon
Cycle
Photosynthesis
Respiration
Waste
Decompositio
n
Respiration
• CO2 is released through aerobic
respiration (breathing, for example)
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the
Carbon
Cycle
Metabolism
Decompositio
n
Photosynthesis
Waste
• Carbonates released into ground
and water supply
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the
Carbon
Cycle
Metabolism
Photosynthesis
Decomposition
Gas Exchange
Gas Exchange
• CO2 is exchanged between the air
and water
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the
Carbon
Cycle
Waste
Photosynthesis
Decomposition
• When organisms die and decay, the
carbon molecules in them enter the
soil.
• Microorganisms break down the
molecules, releasing CO2
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the
Carbon
Cycle
Metabolism
Photosynthesis
Pollution
Pollution
• Remains of dead organisms are
converted into fossil fuels (over
millions of years!)
• Combustion of fossil fuels and
wood releases CO2
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the
Carbon
Cycle
Metabolism Using Water
The Nitrogen Cycle
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Nitrogen Fixation
• Lightning and bacteria convert
atmospheric nitrogen into nitrates
(NO3) and ammonia (NH3)
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the
Nitrogen
Cycle
Protein
Return to Atmosphere
Production
Protein Production
• Plants use nitrogen molecules to
make amino acids
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the
Nitrogen
Cycle
Nitrogen FixationConversion
Conversion
• Consumers convert plant proteins
to animal proteins
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the
Nitrogen
Cycle
Protein Production Waste
Waste
• Decomposers break down animal
and plant matter into nitrogen
compounds
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the
Nitrogen
Cycle
Conversion
Return to Atmosphere
Pollution
Return to Atmosphere
• Nitrogen compounds break down
into gas and return to air
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the
Nitrogen
Cycle
Waste
Nitrogen Fixation
Runoff
• Runoff of nitrates in fertilizers enters
groundwater and soil
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the
Nitrogen
Cycle
Protein Production
Pollution
• Nitrous Oxide from burning fossil
fuels falls as Nitric Acid in rainwater
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the
Nitrogen
Cycle
Waste
Question 1: What would happen to
primary producers and consumers if
nitrogen-fixing
bacteria
were
removed from the ecosystem?
Question 2: Grandma Johnson had very sentimental
feelings toward Johnson Canyon, Utah, where she and
her late husband had honeymooned long ago. Her
feelings toward this spot were such that upon her death
she requested to be buried under a creosote bush
overlooking the canyon.
Trace the path of a CARBON atom from Grandma
Johnson’s remains to where it could become part of a
hawk.
Note: A hawk is a carnivore, but it did NOT dig up and
consume Grandma Johnson’s remains!!!