Unit 2.3- Biogeochemical Cycles- Nitrogen, Phosphorous and Carbo

Multiple Choice

Which of the following is NOT a function of phosphorus in the human body?

• Building carbohydrates

• Forming DNA and RNA

• Creating ATP

• Making up the phospholipid bilayer

Multiple Choice

Which of the following elements is essential for the formation of amino acids and proteins in the human body?

• Nitrogen

• Carbon

• Phosphorus

• Oxygen

Multiple Choice

Why is gaseous nitrogen in the atmosphere difficult to break down?

• Because it has a triple bond that is hard to break

• Because it is very reactive

• Because it is a solid at room temperature

• Because it is found only in water

Multiple Select

Which of the following can convert nitrogen gas into useful forms?

• Lightning

• Man-made fertilizer products

• Photosynthesis

• Respiration

Fill in the Blanks

Denitrification is the process by which

is converted back into nitrogen and oxygen.

Multiple Select

Which of the following are parts of the nitrogen cycle?

• Nitrogen fixation

• Nitrification

• Denitrification

• Photosynthesis

Multiple Choice

Which of the following is NOT involved in the phosphorus cycle?

• Atmosphere

• Rocks

• Water

• Soil

Fill in the Blanks

The main source of phosphorus in the phosphorus cycle is

Multiple Choice

Which of the following are human activities that have affected the phosphorus cycle?

• Use of synthetic fertilizers

• Deforestation

• Burning fossil fuels

• Overfishing

Multiple Choice

Which of the following is NOT a part of the slow carbon cycle as shown in the diagram?

• Atmosphere

• Ocean sediments

• Volcanoes

• Plants

Multiple Select

Which of the following are considered carbon sinks according to the diagram?

• Oceans

• Forests

• Factory emissions

• Fossil fuel deposits