Biogeochemical Cycles

What process is shown by letter B in the diagram?

• condensation

• transpiration

• evaporation

• precipitation

The process in which water vapor is released into the air through the stoma on the leaves of plants is called __________.

• Evaporation
• Transpiration
• Precipitation
• Condensation

Combustion is another word for _______________.

• a train
• a bus
• a dog
• burning

Which of the following removes carbon from the atmosphere? (Check all that apply)

• Combustion

• Respiration

• Photosynthesis

• Death

Which of the following processes returns carbon to the atmosphere? (check all that apply)

• Respiration

• Photosynthesis

• Decomposition

• Combustion

What converts nitrogen gas into a useable form for plants and animals?

• bacteria
• fungi
• rain
• car exhaust 

The process of converting fixed nitrogen back into nitrogen gas is called -

• denitrification

• nitrogen fixation

• assimilation

• nitrification

Which of the following is NOT true of phosphorus and the phosphorus cycle?

• Phosphorus is mined from phosphorus rich rock, which is processed and then added to commercial inorganic fertilizers as well as detergents.

• The phosphorus cycle utilizes the processes of erosion, and weathering.

• Phosphorus is generally found in rocks, sediments, and soil.

• The phosphorus cycle occurs more slowly than the other nutrient cycles.

• Living organisms do not need phosphorus.

The class decided to have a terrarium.  The teacher says it is important to include both plants and animals.  Why is it necessary to include both plants and animals?

• plants provide food for the animals and animals provide water for the plants
• plants provide water for the animals and animals provide food for the plants
• plants provide carbon dioxide for the animals and animals provide oxygen for the plants
• plants provide oxygen for animals and the animals provide carbon dioxide for the plants

What is this a picture of?

• Nitrogen cycle
• carbon cycle
• water cycle
• plant cycle