Tag: our world

Questions Related to our world

The thickness of the mantle is about _____________.

geography inside our earth the earth's structure structure of the earth our world components of earth earth and structure

  1. 2900 km

  2. 2500 km

  3. 2600 km

  4. 2800 km

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Correct Option: A
Explanation:

The mantle is the mostly-solid bulk of Earth's interior. The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick and makes up a whopping 84% of Earth's total volume.

The innermost layer of the earth is _________.

geography inside our earth the earth's structure structure of the earth our world components of earth earth and structure

  1. Crust

  2. Core

  3. Mantle

  4. None of these

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Correct Option: B
Explanation:

Earth's inner core is the innermost geologic layer of the Earth. It is primarily a solid ball with a radius of about 1,220 kilometres (760 miles), which is about 20% of the Earth's radius or 70% of the Moon's radius.

Continental crust can be up to ______ kilometers thick.

geography inside our earth the earth's structure structure of the earth our world components of earth earth and structure

  1. 35

  2. 5

  3. 100

  4. 65

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Correct Option: A
Explanation:

Global observations show that the crustal thickness varies through the tectonic regions. While the continental crust is 30–70 km thick, the oceanic crustal thickness is 6–12 km. 

Which one of the following is present in the largest amount in terms of per cent by mass in the earth's crust?

geography inside our earth the earth's structure structure of the earth our world components of earth earth and structure

  1. Silicon

  2. Oxygen

  3. Carbon

  4. Calcium

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Correct Option: B
Explanation:

Oxygen is by far the most abundant element in the earth's crust. Scientists estimate oxygen comprises nearly half of the mass of the crust. It also accounts for 21 percent of Earth's atmosphere