Read the paragraph under the heading “ Internal structure of the earth” and answ
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Why is it difficult to study the formation of the earth and its
question.
How can you say that the earth is still very active?
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Explanation:
It is difficult to study the structure of the Earth because the crust is too thick to drill all the way through. scientists need to study seismic waves made by earthquakes or man-made explosions.
We can say earth is still very active. Because the matter from deep inside the mantle shoots up through volcanoes and fissures on the ocean floors and cools down to form the earths crust. In many regions on the earth, part of the earths crust enters into and once again become molten.
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