Science - Winds, Storms and Cyclones
Exam Duration: 45 Mins Total Questions : 30
What is an anemometer?
- (a)
A device for measuring atmospheric pressure
- (b)
A device for measuring wind speed
- (c)
A device for measuring atmospheric temperature
- (d)
A device for measuring humidity
Which of the following is the best thing to do during heavy lightning?
- (a)
Lying on the ground in an open place
- (b)
Going into the nearest water b
- (c)
Staying indoors away from metallic doors or windows
- (d)
Standing under a tall tree
During the formation of rain, what happens when water vapour changes to rain drop?
- (a)
Heat is absorbed
- (b)
Heat is released.
- (c)
Heat is first absorbed and then released
- (d)
There is no exchange of heat
How are sea and land breezes caused?
- (a)
Through convection currents
- (b)
Through cyclones
- (c)
Through rains
- (d)
Through conduction
The winds on the earth do not flow in the exact "north to south" or "south to north" directions. Why?
- (a)
Due to the seasons of the earth
- (b)
Due to the shape of the earth
- (c)
Due to the rotation of the earth
- (d)
Due to the revolution of the earth
What is created temporarily behind when a vehicle moves very fast?
- (a)
Low pressure
- (b)
High pressure
- (c)
High temperature
- (d)
Cyclone
Upon heating, gases become lighter. Why?
- (a)
Increase in molecular spaces
- (b)
Decrease in molecular space
- (c)
Breaking of molecules
- (d)
Formation of new molecules
What is the best thing to do when strong winds blow over a hut having a weak thatched roof?
- (a)
Open the doors and windows
- (b)
Close all the doors and windows
- (c)
Make holes in the roof
- (d)
Burn wood inside
Which of these countries is most likely to be affected by cyclones.
- (a)
Nepal
- (b)
Indonesia
- (c)
Hungary
- (d)
Mongolia
Which of the following is NOT affected by air pressure.
- (a)
Riding a bicycle against the wind
- (b)
Flying a kite
- (c)
A ball falling to the ground
- (d)
Drinking a soft drink through a straw
"Water vapour in the atmosphere condenses to form clouds': From this statement, what can be concluded?
- (a)
The temperature decreases as we go higher
- (b)
The temperature increases as we go higher.
- (c)
Pressure increases as we go higher
- (d)
Pressure decreases as we go higher
Which of the following shows that air exerts pressure?
- (a)
The way a straw works
- (b)
The way an ink filler works
- (c)
Falling of raindrops
- (d)
Both (A) and (B)
Warm air is lighter than cold air. Why?
- (a)
Warm air has more pressure
- (b)
Molecules are closer in warm air.
- (c)
Warm air expands and becomes lighter.
- (d)
Both (A) and (B)
Which of the following is most prevalent during the daytime?
- (a)
Sea breeze
- (b)
Land breeze
- (c)
Earthquake
- (d)
Both (A) and (B)
Which of the following is NOT affected by a difference in air pressure?
P - Hurricane
Q - Tornado
R - Volcano
- (a)
Only P and Q
- (b)
Only Q and R
- (c)
Only Q
- (d)
Only R
The cold winds from the polar regions blow towards the equator, but they also move partially towards the west. Which of the following causes this?
- (a)
Revolution of the earth.
- (b)
Rotation of the earth
- (c)
Tilt of the earth's axis.
- (d)
Both (A) and (B).
On what principle does a syringe work?
- (a)
Variance in pressure
- (b)
Variance in temperature
- (c)
Variance in humidity
- (d)
Variance in mass
Which of the following is correct of the composition of air?
- (a)
It changes from place to place
- (b)
It is always the same
- (c)
It is fixed at all heights
- (d)
It is always hot.
What makes rain fall as drops?
- (a)
The air on the earth
- (b)
The dust particles in the air
- (c)
The oxygen in the air
- (d)
The water vapour in the dry air
When water vapour condenses around the dust particles in air, what does it form'?
- (a)
Mist
- (b)
Dew
- (c)
Frost
- (d)
Snow
In which of the following areas does the climate remain almost the same throughout the year
- (a)
Desert area
- (b)
Coastal
- (c)
Mountainous area
- (d)
All of the above
On what factors does the rate of evaporation depend?
- (a)
Temperature of the liquid
- (b)
Area of the liquid exposed to heat
- (c)
Wind blowing over the liquid
- (d)
All of the above
which of the following cases does evaporation take place.
- (a)
Conversion of vapours into liquid state
- (b)
Liquification of compressed air
- (c)
Drying of wet clothes
- (d)
Conversion of solid to gas directly
What causes convection currents in air?
- (a)
The revolution of the earth around the sun
- (b)
The rotation of the earth around itself
- (c)
The heat on the surface of the earth
- (d)
The uneven shape of the earth
Observe the figure given below.
Which of the given statements best explains why the cardboard does NOT fall?
- (a)
The wet cardboard sticks to the glass
- (b)
Atmospheric pressure acts equally on the glass and on the cardboard.
- (c)
The force of gravity pulling the cardboard is negligible.
- (d)
Air exerts pressure on the cardboard in the upward direction
Identify the correct statement among the following.
- (a)
Wind movements are caused by uneven heating of air on the earth
- (b)
The movement of air from land to sea is called sea breeze.
- (c)
When the air moves from sea to land it is called land breeze
- (d)
When air moves from low pressure to high pressure it is called wind
What causes tropical cyclone?
- (a)
The strong air pressure
- (b)
The energy of the ocean waves
- (c)
The energy of the wind
- (d)
The sun's energy
Choose the correct statement from the following.
- (a)
High-speed winds are accompanied by reduced air pressure
- (b)
High-speed winds are accompanied by increased air pressure.
- (c)
Change in pressure does not affect the wind velocity.
- (d)
Humidity can change the velocity and direction of wind.
Which of the following is NOT correct of thunderstorms?
- (a)
They develop in hot, humid tropical areas like India very frequently.
- (b)
They develop in cold, humid areas like polar region very frequently
- (c)
The swift movement of falling water droplets along with rising air create lightning and sound.
- (d)
Upward rising winds produced by rising temperatures carry water droplets upwards.
How is wind useful to mankind?
- (a)
It helps to maintain average temperature on the earth
- (b)
It disperses fresh air from one place to another
- (c)
It helps in the formation of clouds
- (d)
All of the above