Tag: global warming

Questions Related to global warming

Chernobyl nuclear tragedy occurred in

zoology global environmental change causes of greenhouse effect global warming adaptation in animals

  1. April, 1986

  2. August 6, 1945

  3. August 9, 1945

  4. December 3, 1984

Show answer
Correct Option: A
Explanation:

The Chernobyl disaster was a nuclear accident that occurred on 26 April 1986 at the Chernobyl nuclear power plant in Ukraine. In this accident, large quantities of radioactive particles were released into the atmosphere, which spread over much of the western USSR and Europe. It was the worst nuclear accident in history.

Environment is warmed up by

zoology global environmental change causes of greenhouse effect global warming adaptation in animals

  1. Water vapour

  2. Methane

  3. $CO _2$

  4. All of the above

Show answer
Correct Option: D
Explanation:

The greenhouse effect is caused by the greenhouse gases. The gases methane, carbon dioxide, and water vapour trap the solar radiations which need to be reflected back to the atmosphere and increase the temperature of the earth. The greenhouse is considered as the direct cause of global warming.

Thus, the correct answer is option D. 

Presence of CFCs in the atmosphere is responsible for

zoology global environmental change causes of greenhouse effect global warming adaptation in animals

  1. Formation of ozone

  2. Production of healthy plants

  3. Depletion of ozone layer

  4. None of these

Show answer
Correct Option: C
Explanation:

CFCs are used as coolants in refrigerators, coolers, etc. The CFCs causes the breaking of the ozone molecule which forms the oxygen radical and O$ _2$. So, the presence of CFCs in the atmosphere results in the depletion of the ozone layer and allowing the penetration of the harmful UV radiations from the sun into the Earth's atmosphere. 

Thus, the correct answer is option C. 

What immediate hazard is likely to occur if the temperature of the earth rises by 5$^oC$?

zoology global environmental change causes of greenhouse effect global warming adaptation in animals

  1. Increase in productivity

  2. Melting of polar ice

  3. Destruction of phytoplanktons

  4. Inundation of coastal towns

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Correct Option: B

What is the potential danger of greenhouse effect?

zoology global environmental change causes of greenhouse effect global warming adaptation in animals

  1. Poor photosynthesis

  2. Heavy rainfall

  3. Coastal flooding

  4. More humidity in environment

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Correct Option: C

Which of the following does not contributes to greenhouse effect?

zoology global environmental change causes of greenhouse effect global warming adaptation in animals

  1. Carbon dioxide

  2. Carbon monoxide

  3. Chloro-fluoro carbon and Methane

  4. Refrigerant freon

Show answer
Correct Option: B
Explanation:
Greenhouse gases are the compound in the atmosphere that is capable of absorbing infrared radiation, thereby trapping and holding heat in the atmosphere. Popular of them are carbon dioxide, methane, chloro-fluoro carbon, nitrous oxide, freon and ozone while carbon monoxide is silent killer gas
So, the correct answer is option B.

Ultraviolet light causes

zoology global environmental change causes of greenhouse effect global warming adaptation in animals

  1. Destruction of hydrogen bonds between complementary DNA strands

  2. Photodynamic action

  3. Sticky metaphases

  4. Formation of pyrimidines

Show answer
Correct Option: A
Explanation:
DNA is one of the prime molecules and provides stability for proper functioning and existence of all living systems. Ultra-violet radiations are power molecules whose exposure breaks the hydrogen bonds of dna and thus altering its structure and affecting the genomic stability.
So, the correct answer is option A.

Overall the contribution of carbon dioxide to global warming is

zoology global environmental change causes of greenhouse effect global warming adaptation in animals

  1. 20%

  2. 14%

  3. 6%

  4. 60%

Show answer
Correct Option: D
Explanation:

Carbon dioxide is a greenhouse gas. It is released constantly by burning of fuels in industries, automobiles etc. It causes a severe increase in atmospheric temperature and leads to global warming. It contributes nearly 60% of global warming.

So the correct answer is option "D".

Increased level of carbon dioxide in the atmosphere traps the heat rays reflected by the earth causing an increase in the temperature on the earth. This is

zoology global environmental change causes of greenhouse effect global warming adaptation in animals

  1. Local warming

  2. House warming

  3. Global warming

  4. Country warming

Show answer
Correct Option: C
Explanation:

When carbon dioxide and other air pollutants are collected in the atmosphere they absorb sunlight that has bounced from the earth’s surface. This leads to an increase in the earth's average surface temperature and is called global warming. Carbon dioxide emissions from burning fossil fuels and deforestation are the primary cause of global warming. Thus the correct answer is option C.

Increased $CO _2$ concentration in the atmosphere leads to
zoology global environmental change causes of greenhouse effect global warming adaptation in animals

  1. Global warming

  2. Eutrophication of lakes

  3. Depletion of the ozone layer

  4. Magnification in the food chain

  5. Acid rain

Show answer
Correct Option: A
Explanation:

Global warming is caused by increased atmospheric concentration of $CO _2$ and other green house gases. As greenhouse gases absorbs the solar energy when radiation is reflected back to the atmosphere from earth's surface and increase the earth's temperature. Eutrophication refers to the presence of excess organic compounds in water. Depletion of the ozone layer is caused by the excess release of chlorine and bromine-containing the chemical in the atmosphere. Acid rain is the result of increased sulphur and nitrogen oxide levels in the atmosphere. Slow metabolism and excretion of pesticides causes their accumulation in fat tissues of organisms and is referred to as biomagnifications. The correct answer is A.