Câu hỏi: Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer for each of the questions from 30 to 34.
RING OF FIRE
The ring of fire is an enormous chain of volcanoes around the Pacific Ocean. The ring goes from New Zealand up to Asia and across the ocean to Alaska. From Alaska, the ring continues southwardalong the coast of both North and South America. More than seventy-five percent of the world's volcanoes are located in thisring.
Scientists are interested in studying the Ring of Fire because they can observeplate tectonics at work there. In 1912, a German scientist, Alfred Wegener, came up withthe first theory of land movement Wegener said continents are made up of lighterrocks resting on heavier material. Similar to the way large things move while floatingon water, Wegener suggested that the positions of the continents were not fixed, butthat they moved slightly. Later, scientists discovered most of Wegener's ideas wereright on the mark. They then developed the theory called plate tectonics.
According to plate tectonics, the surface of the Earth consists of a number ofenormous plates or sections of rock, each about eighty kilometers thick. The platesfloat and slowly move at speeds between one to ten centimeters every year. That isabout the rate your fingernails grow! Within the Ring of Fire, new material for the Earth's plates is constantly being created as hot liquid rock called magma flows fromthe center of the Earth up to the ocean floor. All the existing plates on the Earth's surfacehave to move slightly to make room for the new material.
As plates move both away from and towardeach other, they run into each other. When they hiteach other, one plate might move under another. This process is called subduction. Subductionfrequently causes earthquakes. It may also resultin the bottom plate meltingdue to the extreme temperatures under the top plate. The magmacreated in this process can rise to the Earth'ssurface and come out through volcanoes, as canbe seen along the Ring of Fire.
What is NOT a result of shifting tectonic plates?
A. Earthquakes
B. Extreme temperatures inside the Earth
C. Volcanoes
D. Subduction
RING OF FIRE
The ring of fire is an enormous chain of volcanoes around the Pacific Ocean. The ring goes from New Zealand up to Asia and across the ocean to Alaska. From Alaska, the ring continues southwardalong the coast of both North and South America. More than seventy-five percent of the world's volcanoes are located in thisring.
Scientists are interested in studying the Ring of Fire because they can observeplate tectonics at work there. In 1912, a German scientist, Alfred Wegener, came up withthe first theory of land movement Wegener said continents are made up of lighterrocks resting on heavier material. Similar to the way large things move while floatingon water, Wegener suggested that the positions of the continents were not fixed, butthat they moved slightly. Later, scientists discovered most of Wegener's ideas wereright on the mark. They then developed the theory called plate tectonics.
According to plate tectonics, the surface of the Earth consists of a number ofenormous plates or sections of rock, each about eighty kilometers thick. The platesfloat and slowly move at speeds between one to ten centimeters every year. That isabout the rate your fingernails grow! Within the Ring of Fire, new material for the Earth's plates is constantly being created as hot liquid rock called magma flows fromthe center of the Earth up to the ocean floor. All the existing plates on the Earth's surfacehave to move slightly to make room for the new material.
As plates move both away from and towardeach other, they run into each other. When they hiteach other, one plate might move under another. This process is called subduction. Subductionfrequently causes earthquakes. It may also resultin the bottom plate meltingdue to the extreme temperatures under the top plate. The magmacreated in this process can rise to the Earth'ssurface and come out through volcanoes, as canbe seen along the Ring of Fire.
What is NOT a result of shifting tectonic plates?
A. Earthquakes
B. Extreme temperatures inside the Earth
C. Volcanoes
D. Subduction
Câu trả lời dựa vào thông tin trong đoạn cuối của bài đọc.
Đáp án B.