Study the following statements about the interior of the earth and select the correct answer from th...........

World Geography (Easy) World Physical Aspects

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Study the following statements about the interior of the earth and select the correct answer from the codes given below:

1. The average density of the outer crust is 2.8.

2. The crust is separated from the mantle by the Gutenberg discontinuity.

3. There is sudden increase in the velocity of P waves along the mantle core boundary.

4. The inner core of the earth is in molten state.

1 and 2

2 and 3

1 and 3

3 and 4

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Explanation:

The Earth is formed of three concentric layers: the core, the mantle and the crust; these are separated by transition zones called discontinuities. The Earth’s inner core is the Earth’s innermost part and according to seismological studies, it has been believed to be primarily a solid ball with a radius of about 1,220 kilometres (760 miles), which is about 70% of the Moon’s radius. Moho discontinuity is the boundary between the Earth’s crust and Mantle.

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