- Introduction
- Rest time! Have fun
- Physics
- Chemistry
- BIOLOGY
- Reaching the age of Adolescence
- CROP PRODUCTION AND MANAGMENT
- Cells : The basic structural unit of life
- Nutrition in human beigns
- RESPIRATION IN HUMAN BEIGNS
- TRANSPORTATION IN HUMAN BEIGNS
- excretory system in human beigns
- NERVOUS SYSTEM
- PHOTOSYNTHESIS
- Respiration in plants
- REPRODUCTION IN PLANTS
- MOVEMENTS IN PLANTS
- Forest our lifeline
- WASTE WATER STORY
- WEATHER,CLIMATE AND ITS ADAPTATION .
- Reaching the age of Adolescence
- Model tests
- Animation time
WINDS,STORMS AND CYCLONES
Air around us exerts pressure.
Air expands on heating and contracts on cooling.
Warm air rises up, whereas comparatively cooler air tends to sink towards
the earth’s surface.
As warm air rises, air pressure at that place is reduced and the cooler
air moves to that place.
The moving air is called wind.
Uneven heating on the earth is the main cause of wind movements.
Winds carrying water vapour bring rain.
High-speed winds and air pressure difference can cause cyclones.
It has become easier to monitor cyclones with the help of advance
technology like satellites and radars.
Self-help is the best help. Therefore it is better to plan in advance and
be ready with defence against any approaching cyclone.
The following flow chart will help you to understand the phenomena
that lead to the formation of clouds and falling of rain and creation of
storms and cyclones:
Air expands on heating and contracts on cooling.
Warm air rises up, whereas comparatively cooler air tends to sink towards
the earth’s surface.
As warm air rises, air pressure at that place is reduced and the cooler
air moves to that place.
The moving air is called wind.
Uneven heating on the earth is the main cause of wind movements.
Winds carrying water vapour bring rain.
High-speed winds and air pressure difference can cause cyclones.
It has become easier to monitor cyclones with the help of advance
technology like satellites and radars.
Self-help is the best help. Therefore it is better to plan in advance and
be ready with defence against any approaching cyclone.
The following flow chart will help you to understand the phenomena
that lead to the formation of clouds and falling of rain and creation of
storms and cyclones: