Nitrogen Cycle

Where can nitrogen fixing bacteria be found (2 right answers)

• Free living in the soil

• under the leaves of flowering plants

• in the atmosphere

• living on the nodules of certain plants

Tags

NGSS.MS-LS2-3

What is the role of denitrifying bacteria

• change nitrate back into nitrogen gas

• change nitrogen gas into nitrate

• absorb carbon dioxide in the soil

• release oxygen gas into the atmosphere

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

How do animals get the nitrogen they need? (2 right answers)

• From the air they breathe

• From the water they drink

• From the plants they eat

• From the meat they eat

What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?

• nitrogen composition

• ammonia 

• nitrogen fixation

• denitrification

The process by which waste and dead organisms release nitrogen back into the soil to be used again.

• Decomposition

• Fixation

• Denitrification

• Sublimation

Tags

NGSS.MS-LS2-3

How do plants get the nitrogen they need?

• from the air

• from the soil or water in which they live

• from the Sun

• from broken-down rocks

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which of these nitrogen cycle processes converts atmospheric nitrogen to a soil form of nitrogen that is usable by plants?

• nitrogen fixation

• nitrification

• denitrification

• ammonification

• assimilation

Which of these nitrogen cycle processes takes nitrogen from its largest reservoir?

• nitrogen fixation

• nitrification

• denitrification

• ammonification

• assimilation

Which nitrogen cycle process is occurring when plant roots absorb ammonium ions and nitrate ions for use in making molecules such as DNA, amino acids, and proteins?

• nitrogen fixation

• nitrification

• denitrification

• ammonification

• assimilation

Which nitrogen cycle process is occurring when bacteria convert ammonium to nitrite and then into nitrate?

• nitrogen fixation

• nitrification

• denitrification

• ammonification

• assimilation

Tags

NGSS.MS-LS2-3