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The Euphotic Zone

Characteristics of The Euphotic Zone
Plants and Animals
Density Independent and Dependent Factors
Parasitism, Mutualism, Coevolution
Trophic Levels
Human Interaction

Carbon and Water Cycles

Carbon Cycle


1.  In the gaseous stage of the process, carbon moves about as mostly carbon dioxide

2.  In the sedimentary stage of the process, carbon is found in organic materials.

3.  The world's supply of carbon dioxide is held in an atmospheric pool.

4.  Carbon dioxide leaves the pool and enters the ocean where phytoplankton use it in photosynthesis.

5.  Phytoplankton make calcium carbonate and it settles to the ocean floor to build up as sedimentary strata.

6.  Other organic materials are made by phytoplankton and sink to the ocean floor where they eventually become hydrocarbons used in making petroleum and natural gas.

7.  On land, plants build up layers of peat that are eventually transformed into coal.

Water Cycle


  • Evaporation- Heat energy given off by the sun causes water on the surface to change into a gas (vapor)

  • Condensation- Water vapor changes back to a liquid in cool conditions

  • Precipitation- Water returns to surface as rain, snow, sleet, hail (cloud cannot hold more water) GROUNDWATER

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