Прочитайте текст и определите какой из заголовков соответствует тексту In a gas atom like hydrogen w...: ответ на тест 782661 - Английский язык

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In a gas atom like hydrogen, when the vibration increases the heat makes the atom expand more and lose its electron. The hydrogen atom becomes two separate charged particles: proton (+) and electron (−). Each of these particles is called plasma – a positive plasma and a negative plasma.
Plasma is not only produced by heat but also by particles bombarding the atoms. We can find plasma produced by heat in the sun, and plasma produced by particles bombarding the atoms in the ionosphere. We can also find artificial plasma during electric welding and inside fluorescent lamps.
Interstellar space, the stars, and most of the universe is plasma. our planet is a tiny mass in a sea of plasma.

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Plasma Cutters
1. Modern industry depends on the manipulation of heavy metal and alloys. We need metals to build the tools and transportation necessary for day-to-day business. The reason is simple: metals are extremely strong and durable, so they're the logical choice for most things that need to be especially big, especially sturdy, or both.
2. The funny thing is that metal's strength is also a weakness: because metal is so good at resisting damage, it's very difficult to manipulate and form into specialized pieces. People can precisely cut and manipulate the metals using the plasma cutter. The plasma cutter is actually a common tool that has been around since World War II.
3. Plasma cutters are not the only devices to harness the power of plasma. Neon signs, fluorescent lighting and plasma displays, just to name a few, all rely on it to get the job done. These devices use "cool" plasma. Though cool plasma cannot be used to cut metals, it has tons of other useful applications.
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How is the effectiveness of plasma used in industry?

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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. The, 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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It is a rather new city. The city is situated on the left bank of the Potomac River, between the states Virginia and Maryland. Its population is about three million people. It was named after the first president of the country.
It is one of the most beautiful  cities in the USA. It is famous for its cherry trees. They were brought there in 1912 as a gift from Japan.

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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.