Tag: earth and structure

Quizzes (0) Questions (128)

Questions Related to earth and structure

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

The innermost layer of the earth is _______.

  1. crust

  2. core

  3. mantle

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

The core is the innermost layer of the earth with density 5.1 to 13.00. It composed of heaviest minerals. This central mass is mainly made of nickel and iron and therefore is known as NIFE. The core contains 1/3 of the entire mass of the earth. The materials of this part may be liquid, plastic or even solid state due to tremendous pressure from above.

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

The Sima layer is formed of _______ and _________.

  1. silica and argon

  2. sulphur and magnesium

  3. silica and magnesium

  4. sulphur and argon
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Sima layer is formed of silica and magnesium. This layer is below top layer and made up of basalt rock which is heavier than the topmost layer. The density of the layer varies from 3.1 to 5.00. the average thickness of this layer is 100 to 2900 km.

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

Lithosphere consists of

  1. Crust of earth

  2. Upper part of mantle

  3. Both A and B

  4. Crust and asthenosphere
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • The lithosphere is the outer solid shell of the Earth and consists of all the mountains, rocks, stones, top soil and sand found on the planet.
  • The lithosphere includes the crust and the uppermost layer of the mantle. It also includes all the rocks under the sea and under the surface of the Earth.
Multiple choice components of earth geography inside our earth the earth's structure structure of the earth our world earth and structure

Most of the continents are formed of ________ layer.

  1. sima

  2. sial

  3. mantel

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

Most of the continents are formed of SiAl layer, i.e., Silica and Aluminium. The upper layer of the Earth's crust is called lithosphere and has 2 parts- upper part forms continents SiAl has a density of 2.7. The lower part is denser and is called SiMa (Silica, Iron, Magnesium).

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

What is the thickness of the lithosphere?

  1. 250 km

  2. 200 km

  3. 150 km

  4. 100 km
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The topmost layer of the earth is solid, the thinnest, and the lightest and is known as the lithosphere. The thickness of the lithosphere of about 100 km. It is mostly composed of granite. The lithosphere has two layers - the outer layer and the inner layer.

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.