What is Carbon cycle?

Topic:

Carbon cycle

Introduction:

Carbon moves from the atmosphere to plants. Carbon moves from plants to animals and Carbon moves from plants and animals to soils.

Explanation:

The carbon cycle describes how carbon transfers between different reservoirs located on Earth. It describes the process in which carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere. 

Since our planet and its atmosphere form a closed environment, the amount of carbon in this system does not change.

Assessment: 

1. This factor contributes to the carbon cycle

(a) fossil fuel combustion

(b) respiration

(c) photosynthesis

(d) all of these

Answer: (d)

2. The source of carbon to plants in the carbon cycle is

(a) fossil fuels

(b) carbonate rocks

(c) atmospheric carbon dioxide

(d) all of the above

Answer: (c)

3. In the carbon cycle, the human body returns carbon to the atmosphere through this way:

(a) formation of glucose

(b) waste products

(c) photosynthesis

(d) cellular respiration

Answer: (d)

4. Respiration and photosynthesis are central to this process

(a) nitrogen cycle

(b) phosphorous cycle

(c) carbon cycle

(d) sulphur cycle

Answer: (c)

5. These entities sequester most carbon from the atmosphere

(a) Plants

(b) Archaea

(c) Bacteria

(d) Insects

Answer: (a)