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Автор: Michael Allaby, Richard Garratt
Издательство: Facts on File Inc
Год издания: 2003
isbn: 0816047898
Количество страниц: 225
Язык: english
Формат: PDF
Размер: 7 Мб
Каталожный номер: 40005
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Have you ever flown in an airplane through cloud? Beneath you the ground falls away as your plane climbs. Then, as you enter the base of the cloud, fragments of cloud begin to cover the ground, which disappears from view a few patches at a time until you lose sight of it altogether. Through the window you can see the wings and engines of the plane quite clearly, but beyond the wingtips there is simply a pale gray nothing. You are looking at the inside of the cloud, and if the cloud were on the ground and you were standing in it you would call it fog. Fog is nothing more than a cloud that touches the ground. Both are made from tiny droplets of water. These are so small you can breathe perfectly easily in the fog, inhaling the droplets and then breathing them out again. They are colorless, odorless, tasteless, and completely harmless. You are unaware of breathing them, but you know the air is full of water because it quickly wets your clothes and hair. In addition, of course, it obscures your view. If you are in the open countryside where there is no road or path to guide you, a fog can soon disorient you by hiding all the landmarks. It is easy to lose your way.
Ключевые теги: экология |
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