Midterm Review: Cycles in Nature

Nitrogen rich fertilizers and manure can cause water pollution.

• True
• False

In the carbon cycle, producers take in the gas __

• carbon dioxide
• oxygen
• nitrogen
• nitrous oxide

How nitrogen is "fixed" into useable form for plants

• only through action of soil bacteria

• only through lightning
• through action of soil bacteria & lightning

• through photosynthesis

The growth of a small community in a place where no life has been before is called

• primary succession

• secondary succession

• assimilation

• a climax community

Which stage does ground water try to return to the ocean or soak into the ground?

• condensation
• evaporation
• precipitation
• run off

Which is the opposite of condensation?

• runoff
• evaporation
• precipitation
• transpiration

Which stages does liquid water from the ocean turn into water vapor?

• condensation
• evaporation
• precipitation
• run off

The variety of plant and animal species present in an area is called

• a climax community

• multiplicity

• biodiversity

• ecology

During which stage do clouds form?

• condensation
• evaporation
• precipitation

Which one of these does not add CO2 to the atmosphere?

• cooking with gas stove

• planting trees
• burning wood
• driving a car