Class 11 Geography Chapter 11 Water in the Atmosphere

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Class 11 Geography Chapter 11 Water in the Atmosphere The answer to each chapter is provided in the list so that you can easily browse throughout different chapters SCERT Class 11 Geography Chapter 11 Water in the Atmosphere and select need one.

Class 11 Geography Chapter 11 Water in the Atmosphere

Also, you can read the SCERT book online in these sections Solutions by Expert Teachers as per SCERT (CBSE) Book guidelines. These solutions are part of SCERT All Subject Solutions. Here we have given Assam Board/NCERT Class 11 Geography Chapter 11 Water in the Atmosphere Solutions for All Subject, You can practice these here…

Water in the Atmosphere

Chapter: 11

PART-1

GEOGRAPHY

TEXTUAL QUESTION & ANSWER

Q.1. Which one of the following is the most important constituent of the atmosphere for human beings? 

(i) Water vapour

(ii) Nitrogen

(iii) Dust particles

(iv) oxygen

Ans: (i) Water vapour

Q.2. Which one of the following processes is responsible for transforming liquid into vapour? 

(i) Condensation

(ii) Transpiration

(iii) Evaporation

(iv) Precipitation

Ans: (iii) Evaporation

Q.3. The air that contains moisture to its full capacity: 

(i) Relative humidity

(ii) Specific humidity

(iii) Absolute humidity

(iv) Saturated air

Ans: (iv) Saturated air.

Q.4. Which one of the following is the highest cloud in the sky?

(i) Circus

(ii) Stratus

(iii) Nimbus

(iv) Cumulus

Ans: (i) Circus.

(b) Answer the following questions in about 30 words.

Q.1. Name the three types of precipitation.

Ans: The three types of precipitation are: 

(i) Rainfall

(ii) Snowfall

(iii) Hailstone.

Q.2. Explain relative humidity.

Ans: The percentage of moisture present in the atmosphere as compared to its full capacity at a given temperature is known as the relative humidity . with the change of air temperature the capacity to retain moisture increases or decreases and the relative humidity is also affected .                    

Q.3. Why does the amount of water vapour decrease rapidly with altitude?

Ans: Water vapour has weight, moreover the density is more than the other elements. so, due to the weight, the amount of water vapour decreases rapidly with altitude.

Q.4. How are clouds formed? Classify theme?

And: By the condensation of the water  vapour in the free air at considerable elevation, Clouds are formed from a mass of minute Water droplets or tiny crystals of ice. As they are formed at some height over the surface of the earth, they take various shapes.According to the height. expanse density  and transparency or opaqueness clouds are classified into four types.

They are:

(a) Cirrus 

(b) Cumulus   

(c) Status.                               

(d) Nimbus

Sl. No.CONTENTS
Chapter 1Geography As A Discipline
Chapter 2The Origin and Evolution of the Earth
Chapter 3Interior of the Earth
Chapter 4Distribution of Oceans And Continents
Chapter 5Minerals and Rocks
Chapter 6Geomorphic Processes
Chapter 7Landforms and Their Evolution
Chapter 8Composition and Structure of Atmosphere
Chapter 9Solar Radiation, Heat balance, and Temperature
Chapter 10Atmospheric Circulation and Weather Systems
Chapter 11Water in the Atmosphere
Chapter 12World Climate and Climate Change
Chapter 13Water (Oceans)
Chapter 14Movements of Ocean Water
Chapter 15Life on the Earth
Chapter 16Biodiversity And Conservation
Chapter 17Indian Location
Chapter 18Structure and Physiography
Chapter 19Drainage System
Chapter 20Climate
Chapter 21Natural Vegetation
Chapter 22Soils
Chapter 23Natural Hazards and Disasters

(c) Answer the following questions in about 150 words :

(1) Discuss the salient features of world  distribution of  precipitation.

Ans; The process of continuous condensation in free air helps the condensed particles to grow in size. When the resistance of the air fails to hold them against the force of gravity, they fall on to the earth’s surface.So after the condensation of water vapour the release of moisture is  known as precipitation.

Different places on the earth’s surface receive different amounts of rainfall in a year and that too in different seasons.

The salient feature of the world distribution of precipitation are as follows: 

1. In general as we proceed from the equator towards the poles, the amount of rainfall goes on decreasing steadily. 

2. The coastal areas of the world receive greater amounts of rainfall than the interior of the continents. 

3. The rainfall is more over the oceans than on the landmasses of the world because of being great sources of water.

4. Between the latitudes 35° and 40°N and S of the equator the rain is heavier on the eastern coasts and goes on decreasing towards the east. 

5. Whenever mountains run parallel to the coast, the rain is greater on the coastal plain, on the windward side and it decreases towards the leeward side.

The following map reveals the world distribution of precipitation.

Q.2. What are forms of condensation describing the process of dew and frost formation.

Ans: The transformation of water vapour into water is called condensation is caused by the loss of heat. When moist air is cooled, it may reach a level when its capacity to hold water vapour ceases.The process of formation of dew and frost is given below: 

Dew: When the moisture is deposited in the form of water droplets on cooler surfaces of solid objects such as stones,grass blades and plant leaves, it is known as dew.The ideal conditions for dew formation are clear sky, calm air, high humidity and cold and long nights. It is also necessary that the dew point is above the freezing point. 

Frost: Frost forms on cold surfaces when condensation takes place below freezing point (0°C),ie. The dew point is at or below the freezing point.

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