10c Nitrogen Cycle and Its Importance
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SPM Form 5 Science Chapter 2
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Question 1 of 8
1. Question
1 pointsWhich of the following will increase the content of nitrates in the soil?
I. Denitrification of bacteria
II. Nitrogen-fixing bacteria
III. LightningCorrect
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Incorrect
The correct answer is “II and III only”.
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Question 2 of 8
2. Question
1 pointsThe diagram shows a simplified nitrogen cycle.
What are the processes labeled X and Y?
X
Y
A
Nitrification
Denitrification
B
Nitrification
Decomposition
C
Decomposition
Denitrification
D
Decomposition
Nitrification
Correct
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Incorrect
The correct answer is “B”.
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Question 3 of 8
3. Question
1 pointsThe diagram shows part of nitrogen cycle.
What is process X?
Correct
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Incorrect
The correct answer is “Lightning”.
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Question 4 of 8
4. Question
1 pointsThe diagram shows part of nitrogen cycle.
What is P?
Correct
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Incorrect
The correct answer is “Nitrogen”.
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Question 5 of 8
5. Question
1 pointsA farmer finds that his land is infertile.
Which natural method can be used to overcome this problem?Correct
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Incorrect
The correct answer is “Plant leguminous plants”.
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Question 6 of 8
6. Question
1 pointsNitrogen is absorbed by the roots of plants in the form of
Correct
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Incorrect
The correct answer is “Nitrate ions”.
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Question 7 of 8
7. Question
1 pointsThe diagram shows a nitrogen cycle.
What are the processes labeled X and Y?
X
Y
A.
Nitrification
Denitrification
B.
Nitrification
Decomposition
C.
Decomposition
Denitrification
D.
Decomposition
Nitrification
Correct
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Incorrect
The correct answer is “A”.
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Question 8 of 8
8. Question
1 pointsA farmer finds the soil fertility decreases after planting sweet potatoes.
Which plant is suitable to regain fertility of the soil?Correct
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Incorrect
The correct answer is “Ground nuts”.