Weather is the state of the Earths atmosphere at a particular place and time, whether it is hot or cold, wet or dry, calm or stormy, clear or cloudy.

Weather is caused by the air that surrounds the planet called atmosphere.

The condition of weather us determined by THREE main elements:

TemperaturePrecipitationWind

Temperature of air depends on two factors:How strong the heat of the sun isWhether there is cloud cover. If there is cloud cover, then the temperature will not be so high. For example, in deserts, cloud cover is much less and the temperature difference between day and night are high. Temperatures in deserts will normally very hot in the day and very cold at night.

Most of the heat at Earths surface comes from sunlight. During the day in a desert such as the Sahara, a lot of sunlight heats the ground, which then heats the air. At night, that heat escapes into space, which makes the temperature in the desert drop very low.

In areas that are not deserts, clouds prevent some sunlight from reaching the ground. Thats why the days are not so hot. Clouds also stop much of the heat from radiating into space, which explains why the nights are not so cold.

Precipitation is water released from the clouds in form of rain, freezing rain, sleet, snow or hail.

When the sun heats up water in rivers or lakes or the ocean and turns it into vapour or steam is evaporated.The water vapour or steam leaves the river, lake or ocean and goes into the air.

Water vapour in the air gets cold and changes back into liquid, forming clouds.This is called condensation.

When so much water has condensed that the air cannot hold it anymore and the clouds get heavy and water falls back to the earth in the form of rain, hail, sleet or snow is called precipitation.

Wind is caused by air movement in the Earths atmosphere.

Winds blow because air is constantly moving from cool area to hot area.

When the Sun warms up the air, it becomes lighter and rises up creating an empty space, which is called an area of low pressure. So, cooler air from an area of higher pressure will move-in to fill the space. This is the cause of wind movement. The bigger the difference in pressure between two areas, the faster the wind blows. The difference in pressure depends upon how much the Sun has heated the particular area.

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For examples, hurricanes or typhoons and tornadoes or twisters