Tag: global environmental change

Questions Related to global environmental change

Which one of the following pairs in mismatched-

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Nuclear power radioactive wastes

  2. Solar energy green house effect

  3. Fossil fuel burning release of $CO _{2}$

  4. Biomass burning release of $CO _{2}$

Show answer
Correct Option: B
Explanation:
Solar energy decreases greenhouse gas emissions. Generating electricity with solar power instead of fossil fuels can dramatically reduce greenhouse gas emissions, particularly carbon dioxide (C$O _2$). Greenhouse gases, which are produced when fossil fuels are burned, lead to rising global temperatures and climate change.

So, the correct answer is 'Solar energy green house effect'.

The reason for green-house effect is

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Higher $CO _2$ concentration causing global warming

  2. Absorption of infra-red rays by gases and dust particles

  3. Both A and B

  4. Rarefaction of $CO _2$

Show answer
Correct Option: C
Explanation:
A minor but very important component of atmospheric carbon dioxide is released through natural process viz., Respiration, volcanic eruption. Humanly induced activities as deforestation, burning fossils, land use changes are major causes for the release of greenhouse gases in the atmosphere.
The greenhouse gases absorb infrared radiation from the sun and trap some of the radiation. Excess of these gases can force climate change drastically.
Hence, the correct answer is 'Both A and B'.

Green house effect is increasing due to

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Increasing $CO _2$ concentration

  2. Increasing $SO _2$ concentration

  3. Increasing concentration of chlorofluorocarbons

  4. Hole in ozone layer

Show answer
Correct Option: A
Explanation:

The higher concentration of carbon dioxide in the atmosphere is likely to increase the temperature as carbon dioxide permits the short wavelength visible radiations to pass through it but traps the longer wavelength infrared radiation reflected by earth's surface. This is called the greenhouse effect and it results in the overall increase in the global temperature, called global warming. Carbon dioxide contributes to the 81% of the greenhouse gases because it tends to persist in the atmosphere.

Hence, the correct answer is 'Increasing CO$ _{2}$ concentration'

Checking of re-radiation heat by atmospheric dust, $O _3, O _2$ and water vapours is

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Ozone layer effect

  2. Solar effect

  3. Radioactive effect

  4. Green house effect

Show answer
Correct Option: D
Explanation:

The greenhouse effect can be defined as the trapping of radiations of the sun by the tropospheric gases and preventing these radiations from reflecting back to space. The tropospheric gases involved are atmospheric dust, Ozone, Carbon dioxide and water vapour. These gases are responsible for causing global warming.

A. Ozone layer effect occurs in stratosphere only because of ozone.
B. Solar effect is caused due to solar flares.
C. The radioactive effect is due to radioactive elements like uranium and plutonium.
D. The greenhouse effect is due to greenhouse gases.
Hence, the correct answer is 'Greenhouse effect.'

Green house effect is due to the accumulation of

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. $O _3$ and depletion of $CO _2$

  2. $O _3$ and $CO _2$

  3. $CO _2$ and depletion of $O _3$

  4. Green plants

Show answer
Correct Option: B
Explanation:
Carbon dioxide and ozone are called greenhouse gases due to their property of absorbing radiation and emitting heat, but the balanced effect depends upon the lifetime and longevity of these gases, Carbon dioxide has  increased in atmosphere due to increased burning of fossils, cutting of trees, Industrial application, trapping of heat waves can cause excessive heating of earth's temperature.
Ozone is naturally found in the stratosphere where it is constantly broken down by UV rays, but the burning of organic volatile compounds and emission of nitrogen oxides have led to the formation of the ozone layer in the atmosphere resulting in excessive trapping of heat
Hence, the correct answer is 'O$ _{3}$ and CO$ _{2}$'.

Which one of the following is mismatched?

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Fossil fuel burning- Release of $CO _2$

  2. Nuclear power- Radioactive wastes

  3. Solar energy- Green house effect

  4. Biomass burning- Release of $CO _2$

Show answer
Correct Option: C
Explanation:

Solar power is the conversion of energy from sunlight into electricity. It is a clean form of energy with zero emission of harmful gases. It decreases dependency on the burning of fossil fuels which emits greenhouse gases which contribute to the warming of the earth's surface in excess. 

A. The burning of fossil fuels is related to the release of carbon dioxide, a major greenhouse gas.
B. Nuclear power plants release radioactive wastes that contaminate the soil and water.
C. Solar energy has no contribution to the greenhouse effect.
D. Biomass burning also results in carbon dioxide emission.
Hence, the correct answer is 'Solar energy- Greenhouse effect'

Green house effect is due to

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. X-rays

  2. UV rays

  3. Green rays

  4. Infra-red rays

Show answer
Correct Option: D
Explanation:

The greenhouse effect is the trapping of the infra-red rays that are reflected by the earth's surface by the atmospheric gases. These gases like carbon dioxide, methane, CFCs, sulphur tetrafluoride etc. are named as greenhouse gases. As a result, these rays are not reflected back to space and increase the overall temperature of the earth, called global warming. The burning of fossil fuels and deforestation are the main anthropogenic causes of the accumulation of greenhouse gases.

So, the correct answer is 'Infra-red rays'

Checking of reradiating heat by atmospheric dust, $O _3, CO _2$ and water vapours is

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Ozone layer effect

  2. Radioactive effect

  3. Greenhouse effect

  4. Solar effect

Show answer
Correct Option: C
Explanation:

The greenhouse effect can be defined as the capture and re-radiation of the infre-red radiations by the tropospheric gases like ozone, carbon dioxide, water vapours and dust. This lead to the increase in the temperature of the atmosphere, and as a result the over all temperature of the earth increases, causing global warming.

A. Ozone layer effect is the absorption of UV rays.

B. Radioactive effect is the release of the radiations by radioactive substances.

C. The greenhouse effect can be defined as the capture and re-radiation of the infre-red radiations by the tropospheric gases like ozone, carbon dioxide, water vapours and dust.

D. Solar effect is the massive release of solar flares.

Hence, the correct answer is 'Greenhouse effect'.

One green house gas contributes $14\%$ to total global warming and another contributes $6\%$. These are respectively identified as

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. $NO _2$ and $CO _2$

  2. CFC and $N _2O$

  3. Methane and $CO _2$

  4. Methane and CFCs

  5. CFCs and $CO _2$

Show answer
Correct Option: B
Explanation:
The warming of earth's surface when sun radiations are absorbed and trapped in earth's atmosphere, is called greenhouse effect. The gases responsible for green house effect are called green house gases which trap the radiations and don't let them reflect back from the earth's surface. The green house gases are Chlorofluorocarbons (CFC's), Carbon dioxide (CO2), Methane (CH4) and Nitrous Oxide (N2O). 
The approximate percentage of different greenhouse gases in the atmosphere is:
CFCs - 14%
CO2 - 60%
‎CH4 - 20%
N2O - 6%
So, the correct answer is 'CFC and N2O'.

Cattle ranches cause acute green house effect because of

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Methanogenic bacteria in rumen

  2. Mechanised milking practices

  3. Decomposition of organic remains in faeces

  4. Decomposition of left over fodder

Show answer
Correct Option: A
Explanation:
Cattle ranches are the grazing animals that are raised on a large land area. Cattles are responsible for green house effect because their rumen (stomach) contains methanogenic bacteria that produce methane gas which is a green house gas. Methane gas is released by the cattle in the atmosphere which then causes green house gas by trapping the radiations and this results in warming of earth's surface.
So, the correct answer is 'Methanogenic bacteria in rumen'.