Weather and climate.

Weather is the condition of the air that surrounds the earth.The weather may be hot or cold,cloudy or clear,windy or calm.It may bring rain,snow.We wear clothes depending largely on the weather.We put on heavy clothes when it is cold and dress lightly when it is hot.We also heat our homes in cold weather and cool them in hot weather.Our mood also depends on the weather.The weather has a great impact on agriculture. Farmers need clear weather to plant and harvest their crops.A storm or a sudden frost can damage or kill much harvest.Weather is not the same as climate.Weather is the condition of the air during a brief period.A region's weather may change greatly from day to day.But the average temperature and the amount of rain and snow remain about the same from year to year.People have tried to predict the for thousands year.Today,scientists use complex instruments such as radar,satellites,and computers to forecast the weather.The forecasts are broadcast on radio and television station and published in newspapers.