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During the rotation of the earth around the Sun, the angle between the polar axis and perpendikulârom to the plane of its orbit remains constant and is 23 °. This explains the changing angle of the Sun's rays fall on a certain latitude within a year. The more is the angle, the more the Sun heats the Earth's surface. Only between the North and South tropìkami regardless of geographical longitude, sunlight falling on the ground vertically and therefore in tropics always warm. In the higher latitudes of both hemispheres of warming is smaller. There are observed significant seasonal fluctuations and uneven distribution of temperatures. In contrast to the equator, where day and night are always the same, at the Poles the day lasts all summer half of the year, and winter always polar night. The duration of the summer day by the Arctic Circle does not compensate for the low position of the Sun and summer here is cool. In winter, polar areas quickly vtračuût′ heat and viholodžuût′sâ, causing the mercury to screen the thermometer never rises above freezing, that is zero degrees Celsius, or thirty-two degrees Fahrenheit scale. In addition to latitude, temperature depends also on the height above sea level, the ceiling, ocean currents, precipitation, degree of contamination of the environment and wind. For example, monsoons blow from land to sea in the winter, and in summer-from the sea to the land, respectively, affecting the weather. For their study used special devices for measurement of the strength of the wind. And heating water to the boiling point at a considerable height above sea level requires fewer calories than at sea level, because water like boiling hot when the temperature is lower by one hundred degrees Celsius.
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