Nutrient Cycling in the Oceans

In this diagram of the carbon cycle, what does the B line represent?

• photosynthesis
• upwelling
• decomposition
• respiration

The ocean's biological pump results in most carbon in the ocean being sent to this location for long term storage:

• surface waters
• the food web
• the seafloor

Which line represents movement of carbon up the food chain?

• line C
• line F
• line B
• line D

Where can calcium carbonate be found in the ocean?

• in fossil fuels
• in coral skeletons
• in the DNA of organisms
• dissolved in the water column

____________ delivers nutrients to the deep sea, and ____________ delivers some back to the surface waters.

• Decomposition, chemosynthesis
• Marine snow, upwelling
• Downwelling, harvesting

Which of the following process does NOT replenish nutrients to surface waters?

• animal excretion
• runoff
• upwelling
• harvesting

Which of the following does NOT deplete nutrients from surface water?

• harvesting
• uptake by phytoplankton
• marine snow
• volcanic ash

What nutrients are needed by organisms to make DNA?

• calcium and magnesium
• carbon
• nitrogen and phosphorus

Which nutrients get passed up the food chain?

• carbon
• nitrogen
• phosphorus
• all of the above

Which photo shows calcium carbonate?

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