Tag: our world

Quizzes (16) Questions (64)

Questions Related to our world

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

The thickness of the mantle is about _____________.

  1. 2900 km

  2. 2500 km

  3. 2600 km

  4. 2800 km
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

The innermost layer of the earth is _________.

  1. Crust

  2. Core

  3. Mantle

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. Silicon

  2. Oxygen

  3. Carbon

  4. Calcium
Reveal answer Fill a bubble to check yourself
B Correct answer
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