Tag: components of earth

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

The Sial layer is formed of _____ and ______.

  1. silica and argon

  2. silica and aluminium

  3. scandium and argon

  4. sulfur and argon
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sial refers to the earth’s crusts upper layer, it is made up of rocks abundant in silicate and aluminium-based minerals. The word Sial itself is an amalgam of the first two letters of aluminium and silica, Sial runs anywhere from 5-70KM deep from the surface.

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

The layer just below the crust is called the ________.

  1. sial

  2. sima

  3. mantle

  4. core
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The layer just below the crust is called the mantle. This layer is the layer of basalt rock which is heavier than the topmost layer. The density of this layer varies from 3.1 to 5.00. The average thickness of this layer is 100 to 2900 km. Silica and magnesium elements predominate and it is popularly known as SIMA.

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

The outer most layer of the earth which is formed of solid rocks is called the ___________.

  1. soil

  2. crust

  3. core

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

The outer most or top most layer of the earth is termed as crust. The crust of the earth is consist of sedimentary and granite rocks. The average density of crust is 2.8 to 3. The outer layer of the earth mainly found under continent. 

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

The thinnest layer of the earth is ___________.

  1. Crust

  2. Mantle

  3. Core

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

The Earth can be divided into four main layers: the solid crust on the outside, the mantle, the outer core and the inner core. Out of them, the crust is the thinnest layer of the Earth, amounting for less than 1% of our planet's volume.

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