Page 122 - SST Class 07

2. ______________ is not a local wind.
(a) foehn (b) chinook (c) monsoon

3. ______________ influence the temperature at the coastal areas.
(a) monsoon winds (b) polar winds (c) land and sea breeze
4. The liquid and solid particles in the air are called ______________ .
(a) dew (b) droplets (c) water vapour
5. ______________ is used to measure humidity.
(a) barometer (b) rain gauge (c) hygrometer

6. ______________ is an example of precipitation.
(a) rainfall (b) temperature (c) wind
7. ______________ is not a form of precipitation.
(a) snow (b) hail (c) thunder
8. ______________ rainfall generally occurs for several days at a time.

(a) convectional (b) relief (c) cyclonic
B. Write ‘T’ for true and ‘F’ for false statements :
1. The atmosphere is an envelope of air around the earth.

2. Water vapour content is very important in predicting weather.
3. The higher the altitude of a place, the lower is its temperature.
4. The amount of water vapour varies from time to time and place to place.
5. When the temperature increases, the rate of evaporation decreases.

6. Cyclones are accompanied by heavy rainfall.
C. Fill in the blanks :
1. The atmosphere is held to the earth’s surface by ______________ .

2. ______________ is the sphere where changes related to weather conditions occur.
3. Rainfall and humidity are the two most important elements of ______________ .
4. Winds blow from regions of ______________ pressure to regions of ______________ pressure.
5. When the air is full of ______________ , it is called humid day.

6. The degree of ______________ and ______________ of the air is termed as temperature.
D. Distinguish between the following :
1. Climate and weather

2. Torrid and frigid zone
3. Thermosphere and stratosphere
4. Seasonal winds and planetary winds
5. Humidity and precipitation
6. Convectional and cyclonic rainfall

E. Answer in one word or phrase :
1. What is the lower part of the stratosphere called?
2. Which winds influence the temperature at the coastal areas?

Contemporary Social Science-7
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