Carbon and Nitrogen Cycle

Match the following steps of the nitrogen cycle to how they move bacteria.

• Ammonification

• Atmosphere to Geosphere

• Nitrogen Fixation

• Geosphere to Biosphere

• Denitrification

• Biosphere to Geosphere

• Assimilation

• Geosphere to Atmosphere

What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?

• Assimilation

• Fixation

• Ammonification

• Denitrification

How is nitrogen "fixed" into a usable form for plants?

• Through action of bacteria only

• Through lightning only

• Through action of bacteria and lightning

• Through photosynthesis

Which process makes nitrites from ammonia?

• ammonification

• denitrification

• nitrification

• nitrogen fixation

A correct path that nitrogen could take would be

• air -> animals -> plants -> bacteria

• animals -> air -> bacteria -> plants

• bacteria -> air -> plants -> animals

• air -> bacteria -> plants -> animals

Organisms that do not decompose naturally can be buried and become what?

• oxygen

• nutrients

• calcium carbonates

• fossil fuels

Increased carbon dioxide may cause global warming by trapping more ____________ in the atmosphere.

• water
• gases
• heat
• water vapor

The conversion of nitrogen gas into

ammonia is called this....

• Nitrogenation

• Nitrogen Fixation

• Nitrogen Synthesis

• Nitrogen Partitioning

In eutrophication, what directly causes the death of fish?

• The plants use up oxygen in respiration

• The fish are poisoned by high CO₂ levels

• Bacteria use up oxygen in respiration

• The fish use up oxygen in respiration

WHAT IS ANOTHER FACTOR THAT CAN CONTRIBUTE TO THE PROCESS OF EUTOPHICATION?

• INCREASED URINE IN RIVERS

• DECREASED SUNLIGHT

• RUN-OFF FROM RAW SEWAGE

Answer explanation

HOWEVER, SUNLIGHT INCREASES WATER TEMPERATURE AND THE PRESENCE OF NUTRIENTS ALTOGETHER PROVIDES SUITABLE CONDITIONS FOR THE GROWTH OF ALGAE AND PHYTOPLANKTON, FINALLY RESULTING IN WATER EUTROPHICATION.