1. Wind blows because of the difference in................... at different places.
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Answers
Answer:
Wind blows because of the difference in air pressure at different places.
Explanation:
If air pressure varies between locations, the wind blows.
Example: The air pressure is higher in an inflated balloon than outside it. If a hole is made in the balloon, the air streams out, creating a wind that blows from the greater pressure in the direction of the lower. The wind settles when the pressure is the same inside the balloon as outside.
In the atmosphere the pressure at the earth's surface reflects the weight of air above it, which in turn is determined mostly by its temperature, and as people generally know from everyday life, hot air is lighter than cold. This fits with the fact that depressions (low pressure systems) usually bring warm air.
Wind that is caused by a difference in pressure spanning a large area (more than about 100 km) does not flow directly from the area of high pressure to the depression as in the example of the balloon. Instead, the wind blows anti-clockwise around the low pressure area in the Northern Hemisphere and clockwise in the Southern Hemisphere. This is the effect of the earth's rotation, which produces a force, called Coriolis, that deflects the wind from its path. The Coriolis force deflects air to the right in the northern hemisphere and to the left in the southern hemisphere. Around the high and low pressure systems one can clearly see on weather charts, e.g. on the TV, there is a system of equilibrium between Coriolis force and the force that pulls air in the direction of lower pressure. Such equilibrium is achieved when wind blows around low pressure systems, and not directly into them.
Answer:
Wind blows because of the difference in pressure at different places.
Explanation:
Wind results from a horizontal difference in air pressure and since the sun heats different parts of the Earth differently, it causes pressure differences across the land, the Sun being the driving force for most winds. Wind is the movement of air across the land surface and is produced by differences in air pressure between one place to another. Wind strength can vary from a light breeze to hurricane force and is measured with the Beaufort Wind Scale.
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