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

World Geography (Easy) World Physical Aspects

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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