What is the earth’s crust made of?
It is made up of different types of rocks.
What are the main constituents of the core?
The main constituents of the core are nickel and iron. It is usually known as nife.
What is the radius of the core?
The radius of the core is about 3500 km.
Name the constituents of the oceanic crust?
Silica and magnesium.
Name the main mineral constituent of the continental mass.
Silica and alumina
What is the special feature of this layer?
It is the thinnest of all the layers
What is called the uppermost layer of the earth?
It is called the crust.
Limestone is changed into marble.
Limestone is changed into marble due to the following reasons: The overlying layers of rocks put pressure on the underlying rocks. From the surface to the interior of the earth, temperature and heat go on increasing. Due to pressure and heat, the original limestone changes into marble.
Sedimentary rocks are formed from sediments.
Sedimentary rocks are formed from sediments because of the following reasons: Igneous rocks and metamorphic rocks, decompose, disintegrate and wear down due to weathering. This material is carried away by running water (rivers), wind, glacier. The material is then deposited in low lying areas and is called sediments. When sediments are solidified into layers due …
We cannot go to the centre of the earth.
We cannot go to the centre of the earth because of the following reasons: The thickness (from crust to the core) is 6371 km. (Radius of the earth). Temperature increases with depth @ 1°C per 32 metre. There is extreme heat and pressure of overlying rocks, everything is in a molten state. There is no …