CBSE Science Class 7
Wind Storms and Cyclones
Wind Storms and Cyclones
Points To Remember:
- Air exerts pressure and expands on heating and contracts on cooling
- Warm air rises up, and the comparatively cool air tends to sink towards the earth’s surface
- When warm air rises up, the air pressure at that place becomes less and cooler air moves toward that place
- Air moves from a region of high pressure to a region of low pressure
- Moving air is called wind
- Wind carrying water vapour brings rain
- Wind movement is caused because of the uneven heating of the earth’s surface
- Cyclones are huge revolving storms caused by winds blowing around a central area of low atmospheric pressure
- Tracking and monitoring cyclones have improved with technology and communication
- Self-help is the best help , thus it is better to plan in advance and be ready with defence against any approaching cyclone
