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- 1. Multiple Choice
IDENTIFY THE DEVICE AND ITS USE
ANEMOMETER, TO FIND WIND DIRECTION
BAROMETER,TO FIND WIND SPEED
ANEMOMETER TO FIND WIND SPEED
NONE OF THESE
- 2. Multiple Choice
INCREASED WIND SPEED IS ACCOMPANIED BY
NO CHANGE IN TEMPERATURE
NO CHANGE IN PRESSURE
REDUCED AIR PRESSURE
INCREASED AIR PRESSURE
- 3. Multiple Choice
WHAT HAPPENS TO AIR ON HEATING?
IT STOPS MOVING
IT EXPANDS AND BECOMES LIGHTER
IT CONTRACTS AND BECOME LIGHTER
IT EXPANDS AND BECOME HEAVIER
- 4. Multiple Choice
WIND IS
MOVING AIR
STILL AIR
HUMID AIR
ALL OF THESE
- 5. Fill in the Blank
WHEN WE FILL AIR IN BICYCLE TUBE IT INFLATES . BUT IF WE CONTINUE TO DO SO,IT WILL BURST AS THE AIR IS EXERTING _______________ ON THE WALLS OF THE TUBE.
- 6. Multiple Choice
CONVECTION IN AIR TAKES PLACE BECAUSE
WARM AIR AND COLD AIR HAVE SAME DENSITIES
COLD AIR IS DENSER THAN WARM AIR
WARM AIR IS MORE DENSE THAN COLD AIR
NONE OF THESE
- 7. Multiple Choice
What causes winds?
DIFFERENCE IN AIR PRESUURE
EQUILIBRIUM OF AIR PRESSURE
- 8. Multiple Choice
a child blowing air with a straw near the opening of another straw which has its other end in a soft drink bottle. It was observed that the level of the soft drink in the straw rises up as soon as air is blown over its open end. Which one of the following best explains the reason for rise in level of the drink?
Blowing of air increases the pressure on the surface of soft drink in the bottle.
The straw of the soft drink bottle collapses when air is blown over its open end
Blowing of air warms up the air inside the straw.
Blowing of air decreases pressure over the opening of the straw.
- 9. Multiple Choice
A curtain is hanging at the entrance of a room and a long corridor runs parallel to the curtain. If a strong wind blows along the corridor, the curtain will
get pushed inside the room.
get pushed outside the room.
get collected towards one end/swirled.
remain unaffected.
- 10. Multiple Choice
THE PAPER BAG KEPT ABOVE THE CANDLE FLAME IN THE BALANCE WOULD
RISE UP
DESCEND DOWN
BE AT THE SAME LEVEL OF THE OTHER BAG
NONE OF THESE
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