Nitrogen Cycle Quiz

______ is the changing of nitrogen gas to inorganic compounds containing ammonium and nitrate

• nitrogen synthesis
• nitrogen eutrophication
• nitrogen fixation
• nitrogen symbiosis

Where does the nitrogen in the ocean mainly come from?

• fish excrement
• volcanoes
• water runoff
• sea shells

Why are beans, peas, and alfalfa plants important to the nitrogen cycle?

• Since they have nitrogen in their chlorophyll, they are a good supply of nitrogen for the animals that eat them
• They store nitrogen in their roots and when they are eaten by animals it gives them their nitrogen fix
• These are legumes and they have bacteria living with them that can convert nitrogen gas to usable nitrogen compounds.
• They are legumes and they can convert nitrogen to usable nitrogen for everything

Nitrogen is the most common element in the atmosphere, yet it limits what can happen in the environment. Why?

• The gas found in the atmosphere needs to actually be in liquid or solid form to be usable
• Nitrogen gas is in the upper portion of the atmosphere and is harder to reach by plants and animals
• Nitrogen gas is unusable in its gaseous form and must be changed to a form that plants and animals can utilize
• Plants and animals need the nitrogen in specific concentrations and the nitrogen in the atmosphere is too concentrated

_______ are bacteria and fungi that are found in the upper layer of the soil that chemically modify ammonia in organic matter to ammonium salts.

• actinomycetes
• rhizobia
• lichens
• cyanobacteria

The process by which ammonia is converted to ammonium is called ________.

• simplification
• nitrification
• ammonification
• denitrification

An effect of eutrophication would be _____. Select all that apply

• fishing and hunting could be impacted
• there could be too much nitrogen in the area and plant growth could be stunted
• increased nitrogen concentration allows choking aquatic vegetation to grow more
• drinking water could be impacted by nitrogen concentrations

Tags

NGSS.HS-ESS3-1

NGSS.HS-LS2-6

One of the effects of humans adding nitrogen to the global cycle is the emission of NO and other nitrogen oxides. Why is this bad?

• it causes and imbalance of nitrogen in the soil
• it is a greenhouse gas
• it is toxic to animals
• it changes the concentration of nitrogen in humans

Tags

NGSS.HS-LS2-7

What do we call the process of taking decomposing plants and animals and converting their nitrogen back into atmospheric nitrogen?

• fixation
• nitrification
• ammonification
• denitrification

True or false: lightning can fix nitrogen

• True
• False