148 по английскому языку за 9 класс  Л.М. Лапицкая, Н.В. Демченко, А.В. Волков

№148 по английскому языку за 9 класс Л.М. Лапицкая, Н.В. Демченко, А.В. Волков

авторы: Л.М. Лапицкая, Н.В. Демченко, А.В. Волков


Английский 9 класс Лапицкая страница 148

Tropical cyclones

A tropical cyclone is born in a low pressure area above warm tropical and subtropical waters, because warm water evaporates and water vapour contains heat and energy (experiment 1). Water vapour molecules give this energy to the atmosphere, and a tropical cyclone develops as a result of interplay of warm and cool air, its rising and falling. A cyclone is constantly powered by the heat from evaporation.

The result is a system of spinning winds, which circulate either anti-clockwise (in the northern hemisphere) or clockwise (in the southern hemisphere), which increase as they near the eye - the centre of a tropical cyclone, but inside the eye of the storm, it is calm.

calm (adj) = not windy



The lowest pressure of a hurricane is around the eye. This low pressure sucks in the water and makes it rise (experiment 2). When a hurricane moves in a certain direction, its strong winds push the water ahead and form very high waves. These two processes collect a huge amount of water which can flood villages, towns, cities and damage beaches. As soon as a cyclone passes overland or over colder water, it rapidly (=quick- ly) loses its strength.

The terms 'hurricane' and 'typhoon' are regional names for a strong tropical cyclone. In Asia they are called typhoons (Chinese tai fung = big wind) and in America hurricanes (Spanish huracan).

2c. Read and draw a simple scheme of how a thunderstorm is formed and explained it.


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