2C Nitrogen Cycle Formative

Based on the picture, what is the chemical formula for atmospheric nitrogen?

• N

• N₂

• NH₃

• NO₃

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

How nitrogen is "fixed" into useable form for plants...

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

Tags

NGSS.MS-LS2-3

According to the model, plants use nitrogen to make what?

• bacteria

• proteins

• plants

• decomposers

Tags

NGSS.MS-LS2-3

A correct path that nitrogen could take would be _____

• air -> animals->plants->bacteria

• animals->air->bacteria->plants

• air -> bacteria ->plants -> animals

• bacteria ->air -> animals->plants

Tags

NGSS.MS-LS2-3

Organisms that break down dead plants & animals and release nitrogen back into atmosphere...

• bacteria
• plants
• animals
• producers

Tags

NGSS.MS-LS2-3

When a plant or animal dies or an animal expels waste, the initial form of nitrogen is organic. Bacteria or fungi convert the organic nitrogen within the remains back into ammonium (NH ⁺ ₄), a process called

• Assimilation

• Nitrogen Fixation

• Ammonification

• Nitrification

• Denitrification

Tags

NGSS.MS-LS2-3

True or False. The nitrogen in the atmosphere is in the right form for living things to use.

• True

• False

Which of the following is not a possible process that results in ammonification?

• photosynthesis

• decomposition

• nitrogen fixation

• fertilizer production

Denitrification...

• animals eat the plants and other animals that contain nitrogen and release it through their waste

• Bacteria in the soil and lightning in the atmosphere “fix” the nitrogen

• nitrogen is released back into the atmosphere from the animal’s waste or decomposers

• plants absorb nitrogen through their roots and return it back to the atmosphere

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

NGSS.MS-LS2-4