The land component of the earth composed of rocks, soils, minerals etc. forms the –(a) hydrosphere (b) atmosphere (c) biosphere (d) Lithosphere

Ans:- (d) Lithosphere

The hydrosphere covers about —- of the earth’s surface.

(a) 61% (b) 71% (c) 81% (d) 87%

Ans:- (b) 71%

The gas which has made the highest contribution to Global Warming is —

(a) Methane (b) Chlorofluorocarbon (c) Nitrous Oxide (d) Carbon Dioxide

Ans:- (d) Carbon Dioxide

The increase of global warming is a-

(a) Local problem (b) Regional problem (c) International problem (d) Personal problem.

Ans:-(c) International problem

At present around —– of the land surface is affected by desertification.

(a) 25% (b) 28% (c) 35% (d) 40 %

Ans:-(c) 35%

Acid rain is caused by —
(a) Carbon monoxide (Co) and Carbon dioxide (CO2) (b) Sulphur dioxide (SO2) and Carbon dioxide (CO2) (c) Sulphur dioxide (SO2) and Nitrogen dioxide (NO2) (d) Nitrogen dioxide (NO2) only.

Ans:-(c) Sulphur dioxide (SO2) and Nitrogen dioxide (NO2)

What are biotic elements?

Ans:-The biotic elements include all sorts of plants and animals ranging from microbes to large mammals.

What are abiotic elements?

Ans:-The abiotic elements are land, water, air, and all other lifeless elements.

Name the famous geographer who said, “the environment is the outcome of the interaction among land, water, air, and life.”

Ans:-Peter Haggett.

What has formed the earth’s hydrosphere?

Ans:-The seas and oceans have formed the earth’s hydrosphere.

How much area of the earth’s surface is covered by hydrosphere?

Ans:-The hydrosphere covers about 71% of the earth’s surface.

What is the height that the atmosphere extends from the surface of the earth?

Ans:-The atmosphere extends to a height of about 480 km from the surface of the earth.

What part of the earth’s environment does the biosphere cover?

Ans:-the biosphere covers those parts of the earth’s environments where life forms occur.

What is the Carbon-dioxide (CO2) content in the atmosphere in normal condition?

Ans:-In normal condition the COcontent in the atmosphere is 0.035%.

Name some environmental pollutants.

Ans:-Zinc, sulphur dioxide, carbon monoxide etc. are some of the environmental pollutants.

What is the Nitrogen content in the atmosphere?

Ans:-78.08%

What is the Oxygen content in the atmosphere?

Ans:-20.94%

what is the Argon content in the atmosphere?

Ans:-0.93%

When was the atmosphere started getting polluted in Europe?

Ans:- The atmosphere started getting polluted after the beginning of the industrial revolution in Europe.

How much of the world’s land surface do deserts cover?

Ans:-20% of the world’s land surface are covered by deserts.

Where is the Sahara desert?

Ans:-The Sahara desert is on the continent of Africa.

What percent of the world’s land surface is affected by the process of desertification?

Ans:-35% of the world’s land surface is affected by the process of desertification.

Name the continent where the proportion of area severely affected by desertification is very high.

Ans:-The continent where the proportion of area severely affected by desertification is very high in North America.

How much solar energy does the atmosphere absorb?

Ans:-19%

What are CFCs?

Ans:-CFCs are the proportion of gases like Methane, Nitrous oxide, chlorofluorocarbons which have caused increase in the atmospheric and earth’s surface temperature by trapping more and more solar energy.

What is the environment?

Ans:-Environment is everything that is around us. It can be living or non-living things. It includes physical, chemical and other natural forces.

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