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Worksheets0Air class 7 chapter 4 (specialised)
Total questions: 20
Worksheet time: 10mins
What is the maximum gas present in the air?
Carbon di oxide
Argon
Dust
Nitrogen
Which is the first layer of atmosphere?
Troposphere
Mesosphere
Stratosphere
Thermosphere
Which gas released in the atmosphere creates a greenhouse effect trapping the heat?
Carbon dioxide
Oxygen
Nitrogen
All of these
Excess amount of CO2 is responsible for
global cooling
global warming
both (a) and (b)
none of these
What are the important objects for survival of plants and animals?
Rainfall
Sun light
Oxygen
All of these
Which is the important gas used by human beings for breathing?
Nitrogen
Carbon dioxide
Oxygen
Sodium chloride
When the air is heated it becomes?
Lighter?
Heavier?
Colder?
None of these
What is the average height of the troposphere?
3 km
9 km
4 km
13 km
As we go up in troposphere layer of the atmosphere the pressure
increases
decreases
no change
all of these
Which one of the following gases protects us from harmful sun’s rays?
Ozone
Nitrogen
Carbon dioxide
Oxygen
Which of the following are part of weather forecast in the newspapers?
Temperature
Humidity
Time of Sunset
All of These
Which element of weather is measured in degree Celsius?
Temperature
Pressure
Wind
Gravity
The water boils at
10°C
50°C
75°C
100°C
Where is the air pressure highest?
Moon
Sea Level
Stratosphere
Exosphere
What is very hot wind called?
Loo
Cool breeze
Monsoon air
Trade wind
Which one of the following is a local wind?
Sea breeze
Trade wind
Monsoon wind
None of these
Rain, snow sleet or hail are the different forms of:
Condensation
Evaporation
Precipitation
None of these
In which layer all weather phenomena occurs?
Troposphere
Exosphere
Mesosphere
Thermosphere
In which direction the wind blows constantly throughout the year in particular direction?
Permanent wind
Local wind
Seasonal wind
None of the above
Which one of the following is local wind?
Sea breeze
Trade wind
Monsoon wind
All of these
