Carbon Cycle

Q.

Draw diagram of (i) nitrogen cycle; (ii) carbon cycle.

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

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

Q.

How is the carbon cycle connected to global warming?

Q.

Chloramphenicol has the following number of chiral carbons:

Q. What is the correct order of air composition?

1. Nitrogen>Carbon dioxide>Argon>Oxygen
2. Nitrogen>Oxygen>Argon>Carbon dioxide
3. Nitrogen>Argon>Oxygen>Carbon dioxide
4. Nitrogen>Oxygen>Carbon dioxide>Argon

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.

Draw diagram of (i) nitrogen cycle; (ii) carbon cycle.

Q.

Give two ways in which carbon dioxide is fixed.

Q.

Which of the following contribute to the carbon cycle?

1. Photosynthesis

2. Burning of fossil fuel

3. Transpiration

4. Respiration

Q. Due to all of the following given processes, carbon is returned to the atmosphere, except_____________.

1. Respiration
2. Photosynthesis
3. Combustion
4. Decay and decomposition

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

Q.

Which of the following is/are not the characteristics of human beings?

1. Excretion

2. Transpiration

3. Stimuli

4. Respiration

Q.

Question 13
Which step is not involved in the carbon-cycle?

(a) Photosynthesis
(b) Transpiration
(c) Respiration
(d) Burning of fossil fuels

Q. is the fourth most abundant element in universe.

1. Hydrogen
2. Oxygen
3. Carbon

Q.

Which step is not involved in the carbon cycle?

1. Photosynthesis

2. Transpiration

3. Respiration

4. Burning of fossil fuels

Q.

What is methane burp?

Q. What is carbon cycle?

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
[2 Marks]

Q. The diagram given below shows how carbon compounds are recycled.
Name the processes shown by the arrows B, C, D, and E.

1. B is respiration; C is decomposition; D is transpiration and E is photosynthesis.
2. B is decomposition; C is respiration; D is respiration and E is photosynthesis.
3. B is respiration; C is photosynthesis; D is respiration and E is photosynthesis.
4. B is decomposition; C is respiration; D is photosynthesis and E is decomposition.

Q.

Consider the following statements regarding the ways in which carbon dioxide is “fixed” and choose the correct option.

1. Green plants convert carbon dioxide into glucose in the presence of sunlight.

2. Marine animals use carbonates dissolved in sea water to make their shells.

1. Only Statement 1 is correct

2. Only Statement 2 is correct

3. Both 1 and 2 are correct

4. Neither 1 nor 2 is correct

Q.

Justify the statement ‘The nitrogen cycle is supposed to be an ideal cycle in the biosphere’.

Q.

Give two main sources of carbon.

Q. Diagram of note nitrogen cycle with explanation

Q.

Describe the methods of carbon replenishment of atmosphere.

Q.

Please explain nitrogen cycle!!!!

Q.

Choose the correct sequences:

1. CO₂ in atmosphere → decomposers → organic carbon in animals → organic carbon in plants

2. CO₂ in the atmosphere → organic carbon in plants → organic carbon in animals → inorganic carbon in soil

3. Inorganic carbonates in water → organic carbon in plants → organic carbon in animals → scavengers

4. Organic carbon in animals → decomposersCO₂ in atmosphere → organic carbon in plants

Q.

Which option can correctly fill up the unknown values in the following equation?

$\left(i\right)+Water\stackrel{Sunlight+\left(ii\right)}{\to }Glucose+\left(iii\right)$

1. (i) Carbon dioxide, (ii) Oxygen, (iii) Chlorophyll

2. (i) Oxygen, (ii) Starch, (iii) Chlorophyll

3. (i) Carbon dioxide, (ii) Chlorophyll, (iii) Oxygen

4. (i) Oxygen, (ii) Chlorophyll, (iii) Carbon dioxide

Q.

What role do bacteriophages play in the carbon cycle?

Q.

Observe the given image carefully and answer the following questions.

1. What is shown in the given image?
2. Label the image.
3. Why do plants need carbon dioxide?
4. How is the level of carbon dioxide increased in the atmosphere?
5. Define carbon cycle.
6. How is carbon dioxide added to the atmosphere?
7. How is carbon dioxide removed from the atmosphere?

Q. The main reserve food material in animals is similar to the main reserve food material in

1. diatoms
2. plants
3. fungi
4. none of these