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CBSE Class 7 Physics Winds, Storms and cyclones (Hard)
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A violent tornado can travel at a speed of about
Leaves of trees, banner or flags flutter when wind is blowing. Why?
A fire alarm usually detects smoke in case of fire. Where should such an alarm be placed in a room?
A curtain is hanging at the entrance of a room. A long corridor runs at right angles to the door, that is parallel to the curtain. If a strong wind blows along the corridor, the curtain will
What is a cyclone?
Increased wind speed
A cyclone warning can be issued
Cyclone warning is issued
An instrument that measures the wind speed is called
Wind currents are generated due to