Tag: carbon cycle

Questions Related to carbon cycle

The main green house gas is

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Ozone

  2. Oxygen

  3. Helium

  4. Cardon dioxide

Show answer
Correct Option: D
Explanation:

Greenhouse gases are the gases that contribute to the greenhouse effect by absorbing the earth's heat and re-radiating it towards the earth. Carbon dioxide is the highest (among gases) contributor towards greenhouse effect and contributes about 9-26%, followed by methane (contributes 4-9%), and ozone (3-7%). Over the past few years, carbon dioxide has caused most of the global warming as it is present in abundance in the atmosphere and its amount is increasing over the years. So, even though other gases have a more contributing effect per molecule, the amount of carbon dioxide is so high that it contributes more than the other gases. Due to this carbon dioxide is considered the main greenhouse gas. 

Thus, the correct answer is 'Carbon dioxide.' 

The true statement about 'Green -house effect' is that it is

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Caused by combination of many gases

  2. Caused only by $CO _2$

  3. Caused by $CO _2,CFC,CH _4$ and $NO _2$ gases

  4. None of the above

Show answer
Correct Option: A
Explanation:
Greenhouse effect is the phenomenon in which radiations from the sun are trapped in the earth's surface and this causes the warming of surface and increase in temperature of earth. Various gases such as carbon dioxide and carbon monoxide trap the heat radiations that enter the earth's surface and promotes greenhouse effect. Such gases are called greenhouse gases. Approximate contribution of different gases to greenhouse effect is as follows:
  • Carbon dioxide (CO2)- 60%
  • Methane (CH4)- 20%
  • Chlorofluorocarbons (CFC)- 14%
  • Nitrous oxide (N2O)- 6%
Hence, greenhouse effect is caused by combination of many gases.
So, the correct answer is 'Caused by combination of many gases'.

Whale washed ashore will die because of?

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Increase in body temperature

  2. Incapability to breathe

  3. Crushing of bones under body weight

  4. Cracking skin

Show answer
Correct Option: A
Explanation:

Avails cannot try photo photo there are number of various reasons why they are unable to live on land first of all their bodies are not designed to hold the weight on the land which is unknown by and environment secondly they have a thick layer of blubber which is fatty tissue and lack of water well quickly overheat get dehydrated and try out the temperature of the water is essential for the survival correct option is increasing body temperature

Green house gases of the following

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. $CO, CO _2$

  2. $SO _2, CO _2$

  3. $CO _2$ methane

  4. Co and Methane

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Correct Option: A

What is the man-made green house gas known as?

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Carbon dioxide

  2. HFC

  3. Ozone

  4. Water Vapour

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Correct Option: B

The most abundant greenhouse gas in the earth's atmosphere:

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Carbon dioxide $(CO _{2})$

  2. Nitrous oxide $(N _{2}O)$

  3. Water vapor $(H _{2}O)$

  4. Methane $(CH _{4})$

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Correct Option: C

The green house gases, otherwise called radioactively active gases includes

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Carbon dioxide

  2. $CH _{4}$

  3. $N _{2}O$

  4. All of these

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Correct Option: D

___________ is the phenomenon where the earth retains heat.

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Air pollution

  2. Green house effect

  3. Global effect

  4. Land pollution

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Correct Option: B

Which two gases are most responsible for greenhouse effect?

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Water vapour

  2. Carbon dioxide

  3. Argon

  4. Both a and b

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Correct Option: D

Chemical substances that increase earth's surface temperature is known as

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Green house gases

  2. Global warming

  3. Climate change

  4. Urbanization

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Correct Option: A