Tag: carbon cycle

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Questions Related to carbon cycle

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

Which gas plays a major role in global warming?

  1. Carbon monoxide

  2. Nitrogen

  3. Carbon dioxide

  4. Sulphur dioxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The warming up of the atmosphere due to trapped radiation is called green house effect. Green house gases like carbon dioxide, methane, nitrous oxide etc; increase in green house gases leads to global  warming.

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

Green house effect is caused by

  1. Green plants

  2. Infrared rays

  3. UV rays

  4. X-rays
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When solar radiation enters the atmosphere, it is absorbed by the clouds and gases and heats the earth's surface. The earth, in return, reflects some of this heat into the atmosphere as infrared radiation. Most of this infrared radiation gets absorbed by atmospheric gases such as carbon dioxide, methane, nitrous oxide, and ozone, commonly known as greenhouse gases. These gases send the infrared radiation back to the earth's surface, thereby heating the surface again. This cycle repeats several times, thereby resulting in the greenhouse effect.

So, the correct answer is 'Infrared rays'.

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

Which of the following contribute to green house effect?

  1. Methane

  2. Carbondioxide

  3. CFCs

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

(The greenhouse effect is the natural process by which the atmosphere traps some of the Sun's energy,  warming the Earth enough to support life.  Most mainstream scientists believe a human-driven increase in "greenhouse gases" is increasing the effect artificially.
These gases include carbon dioxide, methane, nitrous oxide, water vapour, CFCs, ozone etc. Ozone in the stratosphere acts as a protective layer, but harmful if it is present in the troposphere).

So, the correct answer is All of the above'.

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

A natural phenomenon that becomes harmful due to pollution is _____________.

  1. Global warming

  2. Ecological balance

  3. Greenhouse effect

  4. Desertification
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Solar radiation is absorbed in the Earth's surface and emitted as thermal energy that can be re-absorbed by greenhouse gases. Greenhouse gases include water vapor, carbon dioxide, ozone, and methane; the major components of atmospheric gas nitrogen, oxygen, and argon are transparent to infrared radiation. The greenhouse effect insulates the earth's surface, making it hospitable to life; however, human activities have increased the concentration of these gases, causing global warming.

So, the correct answer is 'Greenhouse effect'.

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

Assertion :Green - house effect is due to thick layer of carbon dioxide.

Reason :The glass panels of a green - house allowing the sunlight to filter through but preventing the heat from being re-radiated in outer space.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The assertion that the greenhouse effect is due to a thick layer of CO2 is an oversimplification, as it involves multiple gases and processes. The reason correctly describes how a greenhouse works, but it does not explain why the greenhouse effect on Earth is specifically attributed to a 'thick layer of CO2'.

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

Which one of the following is not a green house gas?

  1. $CO _2$
  2. $CH _4$
  3. $O _2$

  4. CFCs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Greenhouse gases are called so because they are capable of absorbing the insolation from the sun and keeping it within the troposphere, thereby increasing the overall temperature of the earth, called global warming. Carbon dioxide, methane, nitrous oxide, ozone, Chlorofluorocarbons and sulphur hexafluoride are considered to be the potent greenhouse gases. Oxygen is not a greenhouse gas.

Hence, the correct answer is 'O$ _{2}$' 

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

Surface of earth is kept warm by

  1. Solar radiations

  2. Geothermal energy

  3. Green house flux

  4. Absorption of infra-radiations by green house gases
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The gases in the troposphere of the atmosphere absorb the sun radiations and trap them so that they do not reflect back. This process allows the heat to remain trapped with in the atmosphere and the earth surface remains warm. This process is called greenhouse effect and the absorbed radiations striking the earth's surface are called green house flux. Carbon dioxide, water vapour, oxides of nitrogen are useful for this purpose. 

Hence, the correct answer is 'Green house flux'.

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

Green house gases include

  1. $CO _2, CHC, CH _4$ and $N _2O$
  2. $CO _2, O _2, N _2, NO _2$ and $NH _3$
  3. $CH _4, N _2. CO _2$ and $NH _3$
  4. $CFC, CO _2, NH _3$ and $N _2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A greenhouse gas absorb radiation and emit heat energy maintaining the Earth's temperature. However, when released in excess amounts, they cause global warming. Sources are volcanic eruptions, burning of fossil fuels, deforestation, vehicular exhausts, industrial emissions etc. contribute to the greenhouse gases. Carbon dioxide, Chlorinated hydrocarbon (CHC), Methane and oxides of nitrogen are considered to be the major greenhouse gases.

Hence, the correct answer is 'CO$ _{2}$, CHC, CH$ _{4}$ and N$ _{2}$O'