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PHOSPHOROUS CYCLE
• Short-term cycle• Phosphorous is cycled from
the soil to producers and then from producers to consumers
• Long-term cycle• Weathering or erosion of
rocks that contain phosphorous slowly adds phosphorous to the cycle
A. Read the introduction paragraph and answer the
associated questions on your notes sheet.
B. Click on . Watch & listen to the animation of the
Phosphorus Cycle and answer the associated questions
on your notes sheet.
http://sumanasinc.com/webcontent/animations/content/phosphorouscycle.html
NITROGEN CYCLE
• The capture and conversion of nitrogen into a form that is usable by plants is called nitrogen fixation
• Nitrogen enters the food web when plants absorb nitrogen compounds from the soil
• Consumers get nitrogen by eating plants or animals that contain nitrogen
• Nitrogen is returned to the soil in several ways:
• Animals urinate
• Organisms die
• Organisms convert ammonia into nitrogen compounds
• Denitrificationhttp://nortonbooks.com/college/biology/anima
tions/ch38a02.htm
A. Read the introduction paragraph and answer the associated
questions on your notes sheet.
B. Click on . Watch & listen to the animation of the Nitrogen
Cycle and answer the associated questions on your notes sheet.
Oxygen & Carbon CYCLES • Carbon & Oxygen often make
up molecules essential for life
• Carbon & Oxygen recycle relatively quickly through living organisms
• Long-term Cycle
• Organic matter converts to peat, coal, oil or gas deposits (carbon)
• Calcium carbonate (carbon & oxygen)
• Short-term Cycle
• Burning fossil fuels (carbon)
http://www.windows2universe.org/earth/climate/carbon_cycle.html
In this simulation you will take the role of a
carbon atom. Navigate through the Carbon Cycle
Game and answer the questions on your notes
sheet as you go.
WATER CYCLE • Approximately 90% of water
vapor evaporates from oceans, lakes, and rivers
• 10% evaporates from the surface of plants through a process called transpiration
• Freshwater constitutes only ~3% of all water on Earth.
• ~69% of all freshwater is found in ice caps & glaciers.
http://earthguide.ucsd.edu/earthguide/diagrams/watercycle/
GO TO
https://water.usgs.gov/edu/watercycle-kids-
adv.html
TO COMPLETE TABLE