Вопрос № 782662 - Английский язык

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In a star there are two main forces: expansion and gravity. In a blue star, when the force of gravity is stronger than the force of expansion the star collapses at its centre. Then, the pull of gravity from the centre of the star is so strong that it even swallows the light! This makes the star invisible: a black hole. Around each black hole there is an area called event horizon which emits radiation. There is a black hole at the centre of our galaxy.

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Our solar system is over 4,500 million years old. In a solar system, the sun and the planets form at the same time. They form from a cloud of gases called nebula. A nebula rotates in space and the force of gravity pulls material to its centre. The nebula contracts and its centre gets hot. This hot centre becomes a star.
The outer part of the nebula is not so hot. When the temperature goes down the gases condense into particles of dust. The dust slowly sticks together and forms the planets. Life on our planet begins from the dust of a dying star.  

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It is the largest island and the smallest continent in the world. Its area is about eight million square kilometers. The middle of the continent is a vast desert. The population is mostly concentrated along the coasts and in the south-east of the country. Warm seas surround the country, and sharks often come close to its coasts. When we have winter, it is summer in that country, because it is situated in the Southern Hemisphere.

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It is the political centre of London now. In the 1st century King Edward the Confessor decided to build a great abbey church there. Many royal tombs and memorials to famous men and women are situated there. The most popular is the Poet’s Corner. The parliament met here since the 16th century. The present Houses of Parliament were built there after the fire in 1834. St.Stephen’s Tower of the Houses of Parliament contains the famous Big Ben.

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It is situated on the islands in the northwest of Europe. The Atlantic Ocean is on the north of it and the North Sea to the east. The English Channel (21 miles) separates it from the continent. It consists of four parts and occupies the largest island in Europe and many smaller islands. The Atlantic Ocean influences the climate. Winters are not so cold and summers are not as warm as they are usually on the continent.

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It is situated in the North America. It is washed by the Arctic in the north, the Atlantic Ocean in the east and the Pacific Ocean in the west. It is a vast country. Actually it is the second largest country in the world. It borders on the USA in the south. The symbol of the country is a maple leaf.