Ecology SOL Unit 3.4 - Nitrogen Cycle

Ecology SOL Unit 3.4 - Nitrogen Cycle

9th - 12th Grade

9 Qs

quiz-placeholder

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Ecology SOL Unit 3.4 - Nitrogen Cycle

Ecology SOL Unit 3.4 - Nitrogen Cycle

Assessment

Quiz

Biology

9th - 12th Grade

Hard

NGSS
MS-LS2-3, HS-ESS3-1, MS-LS2-1

Standards-aligned

Created by

Tola Ogundipe

FREE Resource

9 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What percentage of the atmosphere is nitrogen?

50%

78%

25%

90%

Answer explanation

Nitrogen makes up about 78% of the Earth's atmosphere, making it the most abundant gas. The other options are incorrect as they significantly underestimate or overestimate nitrogen's presence.

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which form of nitrogen is found in the atmosphere?

Nitrates (NO₃)

Nitrites (NO₂)

Ammonium (NH₄)

Nitrogen gas (N₂)

Answer explanation

The atmosphere primarily consists of nitrogen gas (N₂), which makes up about 78% of the air we breathe. Nitrates, nitrites, and ammonium are forms of nitrogen found in soil and water, not in the atmosphere.

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the first step of the nitrogen cycle?

Nitrification

Nitrogen Assimilation

Nitrogen Fixation

Denitrification

Answer explanation

The first step of the nitrogen cycle is Nitrogen Fixation, where atmospheric nitrogen is converted into a usable form by bacteria, making it available for plants and initiating the cycle.

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

During nitrification, ammonium (NH₄) is converted into what?

Nitrogen gas (N₂)

Nitrates (NO₃)

Nitrites (NO₂)

Ammonia (NH₃)

Answer explanation

During nitrification, ammonium (NH₄) is first converted to nitrites (NO₂) and then to nitrates (NO₃). Therefore, the correct answer is nitrates (NO₃), which are the final products of this process.

Tags

NGSS.MS-LS2-3

5.

LABELLING QUESTION

1 min • 5 pts

Drag and drop the terms to match the steps of the Nitrogen Cycle correctly.

a
b
c
d
e
Nitrogen Fixation
Nitrification
Nitrogen Assimilation
Denitification
Ammonification

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What do plants absorb from the soil during nitrogen assimilation?

Nitrogen gas (N₂)

Nitrates (NO₃)

Ammonium (NH₄)

Nitrites (NO₂)

Answer explanation

During nitrogen assimilation, plants primarily absorb nitrates (NO₃) from the soil. Nitrates are a key form of nitrogen that plants can utilize for growth, making this the correct answer.

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

What process involves decomposers turning nitrogen back into ammonium?

Nitrogen Fixation

Nitrogen Ammonification

Nitrogen Assimilation

Nitrogen Nitrification

Answer explanation

Nitrogen Ammonification is the process where decomposers break down organic matter, converting nitrogen back into ammonium. This is a key step in the nitrogen cycle, facilitating nutrient recycling in ecosystems.

Tags

NGSS.MS-LS2-3

8.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What happens during nitrogen denitrification?

Nitrogen is fixed into the soil.

Nitrites turn back into atmospheric nitrogen.

Ammonium is converted into nitrites.

Nitrogen is absorbed by plants.

Answer explanation

During nitrogen denitrification, nitrites are converted back into atmospheric nitrogen, completing the nitrogen cycle. This process helps reduce excess nitrogen in the soil, making 'Nitrites turn back into atmospheric nitrogen' the correct choice.

9.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

How does fertilizer affect the nitrogen cycle?

It reduces nitrogen in the soil.

It releases more nitrogen into the soil and atmosphere.

It converts nitrogen into oxygen.

It has no effect on the nitrogen cycle.

Answer explanation

Fertilizers often contain nitrogen, which can increase nitrogen levels in the soil. Additionally, some fertilizers can lead to nitrogen being released into the atmosphere through processes like volatilization, thus affecting the nitrogen cycle.

Tags

NGSS.HS-ESS3-1