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READ THE PASSAGE AND CHOOSE THE BEST ANSWERS TO THE QUESTIONS
When Jules Verne wrote Journey to the Center of the Earth in 1864, there were many conflicting theories about the nature of the Earth's interior. Some geologists thought that it contained a highly compressed ball of incandescent gas, while others suspected that it consisted of separate shells, each made of a different material. Today, well over a century later, there is still little direct evidence of what lies beneath our feet. Most of our knowledge of the Earth's interior comes not from mines or boreholes, but from the study of seismic waves - powerful pulses of energy released by earthquakes.
The way that seismic waves travel shows that the Earth's interior is far from uniform. The continents and the seabed are formed by the crust - a thin sphere of relatively light, solid rock. Beneath the crust lies the mantle, a very different layer that extends approximately halfway to the Earth's center. There the rock is the subject of a battle between increasing heat and growing pressure. In its high levels, the mantle is relatively cool; at greater depths, high temperatures make the rock behave more like a liquid than a solid. Deeper still, the pressure is even more intense, preventing the rock from melting in spite of a higher temperature.
Beyond a depth of around 2,900 kilometers, a great change takes place and the mantle gives way to the core. Some seismic waves cannot pass through the core and others are bent by it. From this and other evidence, geologists conclude that the outer core is probably liquid, with a solid center. It is almost certainly made of iron, mixed with smaller amounts of other elements such as nickel.
The conditions in the Earth's core make it a far more alien world than space. Its solid iron heart is subjected to unimaginable pressure and has a temperature of about 9,000oF. Although scientists can speculate about its nature, neither humans nor machines will ever be able to visit it.
Câu hỏi:What is the main idea of the passage?
- A. Jules Verne’s supposition of the Earth’s center.
- B. The Earth’s interior through the study of seismic waves.
- C. The comparison between the Earth’s core and the outer space.
- D. The depth and the temperatures at the Earth’s interior
Lời giải tham khảo:
Đáp án đúng: B
Đáp án B
Nội dung chính của bài nói về: The Earth’s interior through the study of seismic waves
- Cuối đoạn 1: Most of our knowledge of the Earth's interior comes not from mines or boreholes, but from the study of seismic waves - powerful pulses of energy released by earthquakes: Hầu hết kiến thức của chúng ta về bên trong Trái Đất không đến từ các mỏ, giếng khoan, nhưng từ việc nghiên cứu các sóng địa chấn - các xung mạnh mẽ của năng lượng được giải phóng bởi động đất.
- đầu đoạn 2: The way that seismic waves travel shows that the Earth's interior is far from uniform: Cách mà sóng địa chấn di chuyển cho thấy bên trong của Trái Đất còn xa mới thống nhất.
- đoạn gần cuối: Some seismic waves cannot pass through the core and others are bent by it. From this and other evidence, geologists conclude that the outer core is probably liquid, with a solid center: Một số sóng địa chấn không thể đi qua lõi và nhiều cái khác bị bẻ cong bởi nó. Từ điều này và các bằng chứng khác, các nhà địa chất kết luận rằng lõi bên ngoài có lẽ là chất lỏng, với một trung tâm vững chắc
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CÂU HỎI KHÁC
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- The poster was prepared by that artist, ______ had been the creator of many original ones.
- Dammon’s suit was _____ that we could not help laughing at him.
- The room was very noisy, ____ I hardly heard myself talking to others.
- Sarah proposed that we _____ out to the waters of Bala Lake to learn some basic skills of padding.
- Essays ______ in, we all felt relieved and ready for the term break.
- Not until _____ the cartoonist _____ why he was popular with the public.
- The young man was staggering along the street as if he ______ some alcohol.
- Having a few good friends can have good influence on one’s _____ health.
- An ______ psychologist will deliver a speechat the parents’ meeting this weekend.
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- It is widely claimed that watching TV too much may head to headache and eye ____.
- The car was running so fast that I could hardly _____ a glimpse of the man sitting next to the driver.
- Motorists should not get ______ violating laws such as speeding or running through red lights.
- Theodor was very delighted to see his old friends again; he gave her such a _____ handshake.
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- Martha Wells, who is a very good counselor at my school, can ____ some very good advice.
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- Speaker 1: Would you like another cup of tea? -Speaker 2: _________.
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- What is the main idea of the passage?
- What is today’s richest source of information about the Earth’s interior for geologists?
- The word conflicting” in line 1 is closest in meaning to
- The word 'There” in line 9 refers to the ______
- Which of the following is a primary characteristic of the Earth’s mantle?
- Which of the following terms is NOT given as a definition in the passage?
- Which of the following statement is NOT true?
- The phrase 'gives way to” in line 14 is closest in meaning to _____
- The word 'it” in paragraph 4 refers to _____
- Why does the author state in line 17 that the Earth’s core is more alien” than space?
