The Nitrogen Cycle
Interactive Video
•
Science
•
7th Grade
•
Practice Problem
•
Medium
Tamra Freeman
Used 5+ times
FREE Resource
7 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a key molecule require that requires nitrogen for their formation?
DNA
Proteins
Carbohydrate
RNA
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What percentage of our atmosphere is made up of nitrogen gas?
22%
50%
78%
90%
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the bacteria called that break the triple bond of nitrogen gas?
Decomposing bacteria
Nitrogen-fixing Bacteria
Denitrifying bacteria
Nitrifying bacteria
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is atmospheric nitrogen gas (N2) not directly usable by most living organisms?
It is too abundant in the atmosphere.
It has a triple bond that makes it unreactive.
It is a noble gas and does not react with other elements.
It is only found in the upper layers of the atmosphere.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the process called when nitrogen-fixing bacteria convert atmospheric nitrogen gas (N2) into ammonia (NH3) or ammonium (NH4+) in the soil?
Nitrification
Denitrification
Assimilation
Nitrogen Fixation
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the process called when ammonia (NH₃) is converted into nitrates (NO₃⁻)?
Nitrogen fixation
Assimilation
Nitrification
Denitrification
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In which type of environment does denitrification, the conversion of nitrates back into nitrogen gas, primarily occur?
Well-aerated soils
High-oxygen environments
Waterlogged soils
Dry, arid conditions
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