-
1
Which of the following is true?
i. Plants need nitrogen for their survival and humans does not inhale any nitrogen from atmosphere
ii. Oxygen is the second most plentiful gas in the air
A. Only i
B. Only ii
C. Both i and ii
D. None of these
Answer - B
Solution
Points to Know-
• Nitrogen is the most plentiful gas in the air (78%)
• In breathing, human beings inhale some amount of nitrogen into lungs and exhale it
• Plants need nitrogen for their survival.
• Oxygen is the second most plentiful gas in the air (21%)
Hide Answer
Show Answer
-
2
Which gas is called greenhouse gas?
A. Nitrogen
B. Oxygen
C. Carbon dioxide
D. Methane
Answer - C
Solution
Points to Know-
Carbon dioxide released in the atmosphere creates a green house effect by trapping the heat radiated from the earth, therefore called a greenhouse gas.
Hide Answer
Show Answer
-
3
Almost all the weather phenomena like rainfall, fog and hailstorm occur in which layer of the atmosphere?
A. Troposphere
B. Stratosphere
C. Mesosphere
D. Thermosphere
Answer - A
Solution
Points to Know-
• Troposphere – average height is 13 km.
• The air we breathe exists here.
• Almost all the weather phenomena like rainfall, fog and hailstorm occur in this layer.
Hide Answer
Show Answer
-
4
Which layer of the atmosphere contains ozone gas layer?
A. Troposphere
B. Stratosphere
C. Mesosphere
D. Thermosphere
Answer - B
Solution
Points to Know-
Stratosphere lies above the troposphere
It extends up to a height of 50 km.
It contains ozone gas layer
Hide Answer
Show Answer
-
5
Which of the following is true?
i. Weather is the average weather condition of a place for a longer period of time
ii. Water freezes at 0°C and boils at 1000°C.
iii. Air pressure is the pressure exerted by the weight of air on the earth’s surface
A. Only i and ii
B. Only ii
C. Only iii
D. All of the above
Answer - C
Solution
Points to Know-
• Weather is hour-to-hour or day to day condition of the atmosphere.
• Climate is the average weather condition of a place for a longer period of time
• The standard unit of measuring temperature is degree Celsius which was invented by Anders Celsius.
• On the Celsius scale the water freezes at 0°C and boils at 100°C.
• Air pressure is the pressure exerted by the weight of air on the earth’s surface.
Hide Answer
Show Answer
-
6
The incoming solar energy intercepted by the earth is called
A. Isolation
B. Insolation
C. Radiation
D. Encapsulation
Answer - B
Solution
Points to Know-
Insolation is the incoming solar energy intercepted by the earth
Hide Answer
Show Answer
-
7
Which of the following is true?
A. The air pressure is lowest at sea level
B. Amount of insolation decreases from the equator towards the poles
C. With the high temperature, a high- pressure area is created
D. All of the above are true
Answer - B
Solution
Points to Know-
• Insolation is the incoming solar energy intercepted by the earth. Amount of insolation decreases from the equator towards the poles
• The air pressure is highest at sea level and decreases with height
• When the temperature is high, the air gets heated, it expands, becomes lighter and goes up. This creates a low-pressure area.
Hide Answer
Show Answer
-
8
Why astronauts have to wear special protective space suits filled with air when they go to the moon?
A. Because of high pressure on the moon
B. To protect from solar radiation of sun
C. Because of no air on moon
D. None of these
Answer - C
Solution
Points to Know-
• Astronauts have to wear special protective space suits filled with air when they go to the moon because there is no air on the moon.
• If they did not wear these space suits, the counter pressure exerted by the body of the astronauts would make the blood vessels burst.
Hide Answer
Show Answer
-
9
Which instrument is used to measure atmospheric pressure?
A. Cryometer
B. Calorimeter
C. Barometer
D. Hygrometer
Answer - C
Solution
Points to Know-
• Barometer is used to measure atmospheric pressure
Hide Answer
Show Answer
-
10
Trade winds flows from
A. Equator to 30°N
B. 30°N to 60°N
C. 60°N to north pole
D. 30°N to equator
Answer - D
Hide Answer
Show Answer
1
2
next »
