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On Earth, the carbon cycle depicts the transportation of carbon in its elemental and mixed phases. Carbon is the building block of all life on Earth, and it is required to create everything from graphite to sophisticated compounds like proteins and DNA.
The carbon cycle is the process of carbon compounds being exchanged between the biosphere, geosphere, pedosphere, hydrosphere, and atmosphere of the earth. The elemental forms of carbon, diamond and graphite, can be found in combination as carbonates in minerals and as carbon dioxide gas in the environment.
Question
Q.1. Carbon makes up what percentage of the dry weight of living organisms?
- 49 Percent
- 55 Percent
- 20 Percent
- 90 Percent
Answer: The Correct Option is 49 Percent. Carbon makes up around 49% of the dry weight of all living things. It is, after water, the second most plentiful thing in nature. It is the universe’s fourth most abundant element.
Q.2. Mention the Most Abundant Constituent Found in Living Organism?
- Hydrogen Bicarbonate
- Ammonia
- Oxygen
- Water
Answer: Water is the Correct Answer. Water is the most abundant chemical in living creatures. It is the most vital chemical for living organisms’ survival. Water makes up 60% of the human body.
Q.3.What Percent of Carbon is found dissolved in oceans out of the total quantity of global Carbon ?
- 50 Percent
- 71 Percent
- 90 Percent
- 25 Percent
Answer: The Correct option is 71 percent. Out of the entire amount of carbon in the world, over 71 percent is found dissolved in the oceans. Almost all of the remaining 71 percent is found in oceans. Carbon in the oceans ranges from 38,000 to 40,000 gigatons (Gt).
Q.4. Name the reservoir, Regulates the Amount of Carbon Dioxide In the atmosphere?
- Sedimentary Reservoir
- Atmospheric Reservoir
- Oceanic Reservoir
- Gaseous Reservoir
Answer: Oceanic Reservoir is the correct option. Out of the entire amount of carbon in the world, over 71 percent is found dissolved in the oceans. Almost all of the remaining 71 percent is found in oceans. This oceanic reserve controls the amount of carbon dioxide in the atmosphere.
Q.5. How many Percent of total Global carbon does the atmosphere contain?
- 50 Percent
- 1 Percent
- 5 Percent
- 20 Percent
Answer: 1 Percent is the Correct Option. Carbon makes up over 49% of the total dry weight of all living things. Only 1% of the total carbon in the world is in the atmosphere. It is the universe’s fourth most abundant element.
Q.6. Mention Whose reservoir does fossil fuel Represent?
- Carbon
- Oxygen
- Helium
- Argon
Answer: The Correct Answer is Carbon. The carbon reservoir is represented by fossil fuels. The use of fossil fuels emits nearly 21.3 gigatons of carbon dioxide every year.
Q.7. Determine From which Stages does Carbon Cycling Occur?
- Atmosphere → Living organisms → Dead organisms
- Dead organism’s → Living organisms → Oceans
- Atmosphere → Oceans → Living organisms → Dead organisms
- Oceans → Atmosphere → Dead organisms
Answer: The Correct answer is Atmosphere → Living organisms → Dead organisms. Carbon dioxide, a by-product of the atmosphere, finds its way into the oceans. Carbon enters living creatures and then dies as a result of this process. This carbon from decomposing organisms finds its way into the Earth’s crust.
Q.8. Determine The amount of Carbon that is fixed in the biosphere through photosynthesis annually?
- 20 × 1020 kg
- 1013 kg
- 80 × 1035 kg
- 4 × 1013 kg
Answer: The Correct option is 4 × 1013 kg .Photosynthesis is a process in which energy is produced and oxygen is released in the form of gas by producers (green plants) in the presence of CO2, water, sunshine, and chlorophyll. Annually, around 4 × 1013kg of carbon is fixed in the biosphere through photosynthesis.
Q.9. Name the Process by which carbon return to the atmosphere as CO2?
- Calcareous Sediments
- Decayed Organism
- Respiration
- Photosynthesis
Answer: The Correct option is Respiration. The process through which organisms exchange gases with their surroundings is known as respiration. The organisms take in ambient oxygen for various cellular functions and release carbon dioxide as a result of this process. As a result of respiration, carbon returns to the atmosphere as CO2.
Q.10. By processing waste materials and dead organic matter, which of the following organisms adds to the CO2 pool?
- Herbivores
- Carnivores
- Decomposers
- Producers
Answer: The Correct option is Decomposers. Decomposers are creatures responsible for breaking down complex organic stuff (dead or decaying organisms) into inorganic compounds (detritivores). They decompose the dead matter that accumulates on land and in the waters. Invertebrates, fungus, and bacteria are examples of decomposers or detritivores.
Q.11. Mention the Human Activities that significantly influenced the Carbon Cycle?
- Deforestation only
- Afforestation
- Both deforestation and Burning of Fossil Fuel
- Burning of Fossil Fuel only
Answer: The Correct Answer is both deforestation and burning of fossil fuel. Human activities such as deforestation and fossil fuel combustion have had a significant impact on the carbon cycle. The rate of carbon dioxide released into the atmosphere has increased as a result of these activities.
Q.12. After Dissolving in Water in which form does the carbon dioxide precipitate?
- Carbon mono-oxide
- Calcium oxide
- Calcium Phosphate
- Calcium Carbonate
Answer: The Correct option is Calcium Carbonate. CO2 is very soluble in water when it is in gaseous form. When carbon dioxide dissolves in water, it precipitates, resulting in calcium carbonate production.
Q.13. What do plants produce when they use carbon dioxide for photosynthesis?
- Carbohydrates
- Proteins
- Lipids
- Salts
Answer: The Correct option is Carbohydrates. Photosynthesis is the process through which plants convert carbon dioxide into carbohydrates. Photosynthesis is a process in which energy is produced and oxygen is released in the form of gas by producers (green plants) in the presence of CO2, water, sunshine, and chlorophyll.
