Biogeochemical Cycles Lesson

Identify the cycle pictured.

• The Water cycle

• The Carbon cycle

• The Nitrogen cycle

• The Phosphorus cycle

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Identify the cycle pictured.

• The Water cycle

• The Carbon cycle

• The Nitrogen cycle

• The Phosphorus cycle.

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What is the only process that removes carbon from the atmosphere?

• combustion

• cellular respiration

• photosynthesis

• decomposition

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This process is responsible for most environmental problems of excess nitrogen and phosphorus entering streams, lakes and oceans.

• decomposition

• emissions from automobiles

• agriculture and house hold runoff

• photosynthesis

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The movement of a particular chemical through biotic and abiotic parts of an ecosystem

• chemical dispersion

• biogeochemical cycling

• ecological migration

• biological translocation

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​ (a)   is the conversion of NH4 into nitrite (NO2) & then nitrate (NO3) by ​ (b)   .

• Nitrification

• soil bacteria

• Denitrification

• Assimilation

• plants

• animals

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Which of the following is known as the "sedimentary" cycle because its reservoir is sedimentary rock?

• Sulfur cycle

• Nitrogen cycle

• Phosphorus cycle

• Carbon cycle

Phosphorous is needed in organisms for the production of

• ADP and ATP.

• Cellular membranes.

• Deoxyribonucleic and ribonucleic acids.

• All of the answers are correct

Organisms require nitrogen to make which of the following?

• glucose and starch

• lipids and nucleic acids

• proteins and nucleic acids

• carbohydrates and proteins

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The elements carbon, oxygen, hydrogen and nitrogen combined make up about 96% of our bodies (carbon is about 18%). Carbon is necessary for life because it is a(n)

• uncommon element in all living things.

• element found only in the atmosphere

• excellent bonder

• is found mostly in dead things.