Question

Exercises
Answer the following questions briefly
1. What do you mean by the crust of the Earth?
2. Why is the Lithosphere also known as the "Mineral Skin?
3. Describe the interior structure of the earth
4. What forms the basis of Wegener's Continental Drift Theory?
5. Why is the composition of the crustal layer of earth of great interest?
6. What is the Mohorovicic Discontinuity?
7. State the composition of the Sial layer.
8. What does the Sima layer consist of? Where is it located?
2. Distinguish between the Sima and Sal layer.
10. Which are the two most abundant chemical elements in the Earth's crust?
11. Describe the mantle of the Earth.
12. State the properties of the core of the Earth
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Answer 1

Answer:

1.“Crust” describes the outermost shell of a terrestrial planet. Earth's crust is generally divided into older, thicker continental crust and younger, denser oceanic crust. ... Earth has three layers: the crust, the mantle, and the core. The crust is made of solid rocks and minerals.

2.Lithosphere is also known as the 'Mineral Skin' because it is the layer of the uppermost crust of the Earth composed of rocks and minerals.

3. The internal structure of Earth is layered in spherical shells: an outer silicate solid crust, a highly viscous asthenosphere and mantle, a liquid outer core that is much less viscous than the mantle, and a solid inner core

4. Alfred Wegener first presented his hypothesis to the German Geological Society on 6 January 1912. His hypothesis was that the continents had once formed a single landmass, called Pangaea, before breaking apart and drifting to their present locations.

6.The Mohorovičić discontinuity, usually referred to as the Moho, is the boundary between the Earth's crust and the mantle. It is defined by the distinct change in velocity of seismological waves as they pass through changing densities of rock. The Moho lies almost entirely within the lithosphere.

Answer 2

Answer:

1. The earth crust is the uppermost layer of the earth.

2. The lithosphere is also known as the mineral skin because it contains all the mineral constituent.

3. There are mainly 4 layers of the earth. Uppermost layer is the crust, next is the Mantle, next is outer core, and last the inner core.

4. Sorry I don't know that

7. The component of SIAL layer is Silica and Aluminium as the name suggest (SI for Silica and AL for Aluminium)