Ans. The movement of air from high pressure area to low pressure areas is called wind.
Ans. Sweat from our body does not evaporate easily, making us feel very uncomfortable.
Ans. The average weather condition of a place for a longer period of time represents the climate of a place.
Ans. In thermosphere temperature rises very rapidly with increasing height.
Ans. When trees on hill sides are cut, rainwater flows down the bare mountains and can cause flooding of low lying areas.
Ans. A wind is named after the direction from which it blows, e.g. the wind blowing from the west is called westerly.
Ans. Nitrogen and oxygen are two gases which make up the bulk of the atmosphere.
Ans. Carbon dioxide released in the atmosphere creates a greenhouse effect in the atmosphere.
Ans. On the basis of mechanism, there are three types of rainfall: the convectional rainfall, the orographic rainfall and the cyclonic rainfall.
Ans. Air pressure is defined as the pressure exerted by the weight of air on the earth’s surface.
Ans. Winds can be broadly divided into three types: Permanent winds, Seasonal winds and Local winds.
Ans. Carbon dioxide released in the atmosphere creates a greenhouse effect by trapping the heat radiated from the earth.
Ans. When air is heated, it expands, becomes lighter and goes up. Cold air is denser and heavy. That is why it tends to sink down.
Ans. Wet clothes take longer time to dry on a humid day because the air has a plenty of water vapor already present in it and is not able to accommodate more water vapor.
Ans. When the level of carbon dioxide increases in the atmosphere due to factory smoke or car fumes, the heat retained increases the temperature of the earth. This is called global warming.
Ans. The amount of insolation decreases from the equator towards the poles. Therefore, the temperature decreases in the same manner. That’s why poles are covered with snow.
Ans. Most of the ground water comes from rainwater. Plants help preserve water. When trees on hill sides are cut, rainwater flows down the bare mountains and can cause flooding of low lying areas.
Ans. Plants need nitrogen for their survival. They cannot take nitrogen directly from the air. Bacteria that live in the soil and roots of some plants take nitrogen from the air and change its form so that plants can use it.
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