Free Collection of The Carbon Cycle Worksheets for Students - Free Printable

The Carbon Cycle (Worksheet) Solution

#### Q.1. Fill in the blanks with suitable words.
a) Carbon is a chemical element with the symbol _______.
- Answer: C

b) Carbon in the atmosphere is found in the form of _________________.
- Answer: Carbon dioxide (CO₂)

c) _______________ is the exchange of carbon between the land, the oceans, the atmosphere, and the Earth's interior.
- Answer: The carbon cycle

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#### Q.2. Write T or True if the statement is true; write F or False if the statement is false.
1. All living things are made up of molecules that contain carbon.
- Answer: T (True)
- Explanation: Carbon is the building block of organic molecules, which are essential for life.

2. Carbon is the most abundant element in the universe.
- Answer: F (False)
- Explanation: Hydrogen is the most abundant element in the universe, followed by helium. Carbon is the fourth most abundant element.

3. The burning of fossil fuels releases more carbon dioxide into the atmosphere.
- Answer: T (True)
- Explanation: Burning fossil fuels (coal, oil, natural gas) releases CO₂, contributing to increased atmospheric concentrations.

4. Producers capture the carbon dioxide and convert it to glucose through the process of respiration.
- Answer: F (False)
- Explanation: Producers (plants and some microorganisms) capture CO₂ and convert it to glucose through photosynthesis, not respiration.

5. Atmospheric carbon dioxide produces greenhouse effect by trapping heat near Earth’s surface.
- Answer: T (True)
- Explanation: CO₂ is a greenhouse gas that traps heat in the atmosphere, leading to the greenhouse effect.

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#### Q.3. Label the diagram below which shows the carbon cycle.
The diagram illustrates the movement of carbon through different reservoirs. Here are the labels for each box:

1. Left side (below the tree):
- Label: Plants/Producers

2. Middle top (above the plant):
- Label: Atmosphere (CO₂)

3. Right side (above the factory):
- Label: Combustion/Fossil fuel burning

4. Middle bottom (below the sheep):
- Label: Consumers

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#### Q.4. Carbon dioxide is produced by the human body through _____________.
- Options:
a) combustion
b) respiration
c) photosynthesis
d) decomposition

- Answer: b) respiration
- Explanation: During respiration, humans inhale oxygen (O₂) and exhale carbon dioxide (CO₂).

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#### Q.5. Carbon dioxide from livings is also returned to the atmosphere through processes of _____________ of dead tissue.
- Options:
a) combustion
b) respiration
c) photosynthesis
d) decomposition

- Answer: d) decomposition
- Explanation: When dead organisms decompose, microorganisms break down the organic matter, releasing CO₂ back into the atmosphere.

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Final Answers:

1. a) C
b) Carbon dioxide (CO₂)
c) The carbon cycle

2. 1. T
2. F
3. T
4. F
5. T

3. Labels:
- Left: Plants/Producers
- Middle top: Atmosphere (CO₂)
- Right: Combustion/Fossil fuel burning
- Middle bottom: Consumers

4. b) respiration

5. d) decomposition

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Summary of Key Concepts:

- Carbon Cycle: The continuous movement of carbon through the environment, involving processes like photosynthesis, respiration, decomposition, and combustion.
- Photosynthesis: Plants absorb CO₂ and produce glucose and O₂.
- Respiration: Living organisms consume O₂ and release CO₂.
- Decomposition: Dead organisms break down, releasing CO₂.
- Combustion: Burning fossil fuels releases large amounts of CO₂.

This worksheet helps understand the interconnectedness of carbon in various environmental processes.