Air
Air also affects the weather. The sped of air is not always the same. Sometimes it blows on a slow speed and some times very fast.
When it blows at a high speed, it creates faster evaporation in him sources of water. When it blows on a low sped there is a slow evaporation.
Know by experiment
Take two pieces of marble of the same size. Drench them by water. Put the one in an airy place and the other away from the airy place. See them attentively. The water of the piece put in the airy place is dried up soon, while water of the pieces away from the airy places is dried up late.
This experiment shows that the speed of air affects the evaporation.
On this basis it is proved that fast blowing air dries up the wet clothes soon.
Rain
Clouds leave a great effect on weather. In rain the weather is watery.
By the heat of the sun water of various sources is dried up and turns into stream. This steam mingles in the air atmosphere. When this water vapor reaching upwards goes to a certain high, the air becomes cool. This action makes the tiny drops of water. On cooling, steam recharges into water. This process is called condensation. When these tiny drops of water come close, clouds are formed. When the clouds become much cold, the drops of water become very big. Due to heaviness these big drops of water cannot stay long in air and begin to fall down on the earth in the form of rain.
Weather is not always the same. It is always changing. Weather is cold at the sun rise in the morning. At noon it is hot. In the evening it is again clod. Generally it is cold at night.
When weather is pleasant it looks nice to walk and to do various work. We feel uneasiness in much heat, much cold, fast blowing wind and too many rains. Generally our health is affected due to inclement weather. At so many places crops are also decayed and destroyed. There comes hindrance in communication and transportation.
Now- a –days we get information about weather by means of news papers, radio television and internet etc.
There are three main seasons in as year-winter, summer and rainy season. Every season stay about four months.
Rotating on its axis the earth revolves round the sun. The movement of the earth on its axis is called rotation.
The earth takes 24 hours –one day to rotate on its axis.