Earth although has an average density of 5.5 g/cm cube, its core has a density of more than 11 g/cm cube.What are the possible reasons?1) Core is formed of materials like iron, nickel etc which has higher density.2) Incumbent pressure from the overlaying rocks.3) High temperature prevalent in the core region [more than 5000 degree Celsius].Choose the correct code from the following.

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Earth although has an average density of 5.5 g/cm cube, its core has a density of more than 11 g/cm cube.
What are the possible reasons?
1) Core is formed of materials like iron, nickel etc which has higher density.
2) Incumbent pressure from the overlaying rocks.
3) High temperature prevalent in the core region [more than 5000 degree Celsius].
Choose the correct code from the following.

1, 2 only.

2, 3 only.

1, 3 only.

All the above.

Explanation:
High temperature need not result into higher density.

Next Question

There are different discontinuities within the Earth’s internal structure. Which are the discontinuities that have been incorrectly matched with its/their respective locations?
1) Mohorvic discontinuity -- boundary between Core and Mantle.
2) Wiechert-Gutenberg discontinuity -- boundary between Crust and Mantle.
3) Conrad discontinuity – located at a depth of 15-20kms from the Earth’s surface.
Choose the correct code from the following.

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