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://www.nwrfc.noaa.gov/info/water_cycle/h

ydrology.cgi TO COMPLETE TABLE