Biogeochemical cycling

What does NOT produce atmospheric carbon dioxide?

• Photosynthesis

• Burning Fossil Fuels

• Animal respiration

• Anything living in the ocean.

The diagram shows the flow of organic molecules through an ecosystem. What two processes are identified by the labels X and Y?

• X : Respiration
  Y : Predation
• X : Adaptation
  Y : Decomposition
• X : Fermentation
  Y : Nitrogen Fixation
• X : Decomposition
  Y : Respiration

Which of the following is an example of a decomposer?

• Owl
• Fish
• Tree
• Mushroom

The main human activity that releases greenhouse gases is

• using public transportation and there by reduce the affects of greenhouse gases.

• burning fossil fuels

• texting on cellphones

• eating meat

This is NOT a part of the phosphorus cycle.

• Phosphate is incorporated into sedimentary rocks

• Phosphate bound to soil

• Atmospheric phosphate

• Phosphate is absorbed from the soil by plants

What role do decomposers play in the phosphorous cycle?

• absorb phosphorous 
• release phosphorous into atmosphere
• return phosphorous into the soil
• combustion

Too much phosphorus in waterways (rivers, lakes) can lead to___________.

• eutrophication

• Nothing

• Death

• diseases

The major sink for phosphorus is

• sedimentary rock

• atmospheric gases

• seawater

• plants

The phosphorus cycle is a slow process

• True

• False

Carbon can be found in...

• The atmosphere
• Soil
• Fossil fuels
• All of the above