NIOS Class 12 Geography Chapter 8 Humidity and Precipitation

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NIOS Class 12 Geography Chapter 8 Humidity and Precipitation

Also, you can read the NIOS book online in these sections Solutions by Expert Teachers as per National Institute of Open Schooling (NIOS) Book guidelines. These solutions are part of NIOS All Subject Solutions. Here we have given NIOS Class 12 Geography Solutions, NIOS Senior Secondary Course Geography Solutions for All Chapter, You can practice these here.

Humidity and Precipitation

Chapter: 8

MODULE – 4: Dynamics of Atmosphere

INTEX QUESTION 8.1 

1. Fill in the blanks with appropriate word-

(a) ______ is very important among elements of weather.

Ans: Humidity.

(b) The temperature at which the air becomes fully saturated is called______ .

 Ans: Dew point.

(c) The relative humidity of saturated air is _________ percent.

Ans: 100 percent.

2. Give a geographical term for each of the following: 

(a) The amount of water vapour actually  present in the atmosphere. 

Ans: Absolute humidity.

(b) The air that contains moisture to its full capacity is called ______.

Ans: Saturated air.

(c) Amount of invisible water vapour present in atmosphere is generally termed as _________. 

Ans: Humidity.

(d) The temperature at which a sample of air becomes saturated. 

Ans: Dew Point.

(e) The weight of water vapour per unit of air is termed as __________.

Ans: Specific humidity.

INTEXT QUESTION 8.2 

1. Write geographical term for each of the following: 

(a) Physical process in which liquid like water transformed into vapour or gaseous state _____ .

Ans: Evaporation.

(b) At the time of evaporation heat is observed and conserved in water vapour. It is known as _____ .

Ans: Latent heat.

(c) The process of change of water vapour into liquid or solid state____ .

Ans: Condensation.

(d) Condensation always takes place around some particles that are known as _____ .

Ans: Nuclear.

2. Name three types of fog. 

Ans: (i) Radiation fog.

(ii) Advection fog.

(iii) Frontal fog.

3. List any three factors which affect the rate of evaporation. 

Ans: (i) Temperature.

(ii) Wind.

(iii) Air Moisture.

INTEX QUESTIONS 8.3

1. Give a geographical term for each of the following. 

(a) The process in which water vapour is changed into water _______ .

Ans: Condensation.

(b) Leeward side of the mountains or heel receives less rainfall ______ .

Ans: Less rainfall.

(c) The ascent of humid and warm air and its contact with colder air results in ____ .

Ans: cyclonic rainfall .

(d) The light rain falling in very tiny drops is called _____ .

Ans: Drizzle.

2. List any four forms of Precipitation.

Ans: (i) Rain. 

(ii) Snowfall.

(iii) Sleet.

(iv) Hail.

3. Name three types of rainfall. 

Ans: (i) Convectional.

(ii) Orographic or Relief rainfall.

(iii) Frontal or Cyclonic rainfall.

TERMINAL QUESTIONS 

1. Explain the importance of water vapour in the atmosphere. 

Ans: Water vapor in the atmosphere plays a crucial role  Water vapor is a key component of the Earth’s greenhouse effect, trapping heat and influencing temperature. Water vapor condenses into clouds, leading to precipitation (rain, snow, etc.) that sustains life and ecosystems.  Water vapor helps drive atmospheric circulation patterns, shaping global weather systems. Water vapor supports plant growth, agriculture, and maintains ecosystem balance. Water vapor is essential for regulating Earth’s climate, weather, and life support systems.

2. Define humidity. 

Ans: Humidity is the concentration of water vapour present in the air. Water vapour, the gaseous state of water, is generally invisible to the human eye. Humidity indicates the likelihood of precipitation, dew or fog to be present. Humidity depends on the temperature and pressure of the system. It also indicates the degree of dampness or wetness of the air.