Carbon Cycle: Elements, Factors and Processes Involved

Q.

What are the reservoirs of carbon?

Q.

Protein is mainly formed by carbon, hydrogen, nitrogen and oxygen.

1. Keratin
2. Hemoglobin

Q. Which of the following biomolecules contain carbon?

1. Carbohydrates
2. Lipids
3. Amino acids
4. Nucleic acids

Q. Match the following.

$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{A. Atmosphere}& \text{1.Outer crust of the Earth}\\ \text{B. Hydrosphere}& \text{2.Comprises of both biotic and abiotic components}\\ \text{C. Biosphere}& \text{3. Sheet of gases that surround the planet}\\ \text{D. Lithosphere}& \text{4.Comprises of water}\end{array}$

1. A-2, B-3, C-4, D-1
2. A-3, B-4, C-2, D-1
3. A-4, B-1, C-3, D-2
4. A-2, B-4, C-1, D-3

Q. Which of the following processes release carbon dioxide to the atmosphere?

1. Volcanic eruptions
2. Respiration
3. Combustion
4. Decomposition

Q.

Which of the following activities would lead to increased carbon dioxide level in the atmosphere?

1. Burning of fossil fuels
2. Industrialization
3. Deforestation
4. Afforestation

Q.

Write a short note on wind.

Q.

Define smog.

Q. Which one is the correct sequence of events in the Carbon Cycle?
(a) $C{O}_2$ in atmosphere → decomposers → organic carbon in animals → organic carbon in plants
(b) $C{O}_2$ in atmosphere → organic carbon in plants → organic carbon in animals → inorganic carbon in soil
(c) Inorganic carbonates in water → organic carbon in plants → organic carbon in animals → scavengers

[1 Mark]
[Carbon Cycle]

Q. is the fourth most abundant element in universe.

1. Hydrogen
2. Oxygen
3. Carbon

Q.

Smog is a mixture of _____ and ______.

Q. Which of the following is not an elemental form of carbon?

1. Diamonds
2. Ozone
3. Graphite
4. Fullerenes

Q. Which of the below processes are part of the carbon cycle?

I. Release of carbon dioxide by the process of respiration.
II. Decomposition of plants and trees leading to the formation of coal.
III. Conversion of organic compounds into ammonia through the process of ammonification.
IV. Formation of limestones.

1. I, III and IV
2. I, II and IV
3. I, II and III
4. II, III and IV

Q. A is a pathway by which a chemical substance moves through biotic and abiotic components of the earth.

1. cell cycle
2. biogeochemical cycle
3. life cycle

Q. The given figure shows a part of the carbon cycle. Which of the following processes is represented by P?

1. Photosynthesis
2. Transpiration
3. Combustion
4. Respiration