NCERT Class 7 Geography Chapter 2 Inside Our Earth Extra Questions and Answers
Class 7 Geography Chapter 2 Extra Questions and Answers – Inside Our Earth. Here in this Page Class VII Students can Learn Extra Questions & Answer 2nd Chapter Geography fully Inside.
We Provided Here Inside Our Earth Geography Chapter 2 Long Answer Type Question, MCQ Questions & Answer, Short Answer Type Questions (2 or 3 marks), and Very Short answer Type Question (1 marks).
Class 7 Geography Chapter 2 Extra Question with Answer – Inside Our Earth
Geography Chapter 2 Inside Our Earth Class 7 Inside 5 Marks, 3 marks, 2 Marks & And 1 Marks Important Questions and Answers.
MCQ Type Extra Questions
(1) The payer that comprises the largest volume of earth i s
(a) Crust
(b) Mantle
(c) Inner Core
(d) Outer Core
Ans:- (b) Mantle
(2) The rocks formed by the solidification of magma inside the earth
(a) Sedimentary rocks
(b) Metamorphic rocks
(c) Intrusive igneous rocks
(d) Extrusive igneous rocks
Ans:- (c) Intrusive igneous rocks
(3) The cycle transformation of rocks from one to another is called –
(i) Rock formation
(ii) Water cycle
(iii) Carbon cycle
(iv) Rock cycle.
Ans – (iv) Rock cycle.
(4) The lightest of the materials are concentrated in this layer
(a) Crust
(b) Mantle
(c) Inner Core
(d) Outer Core
Ans:- (a) Crust
(5) Marble is a form of which rock ?
(a) igneous
(b) sedimentary
(c) metamorphic
Ans:- (c) metamorphic
(6) Fossil is found in ________
(i) Igneous rock
(ii) Sedimentary rock
(iii) Metaphormic rock
(iv) None of above.
Ans – (ii) Sedimentary rock
Very Short Answer Type Extra Questions
(1) Why do you think that fossils occur only in sedimentary rocks?
Solution:
Sedimentary rocks are formed by solidification of sediments. The sediments when transported by running water or wind carry the remains of plants and animals that come their way. These are sandwiched between the layers of the sedimentary rocks when solidified and become fossils.
(2) What is meant by rock cycle ?
Solution:
One type of rock changes to another type under certain conditions in s cycle manner. This process of transformation of the rock from one another is known as the rock cycle .
In case you are missed :- Previous Chapter Extra Questions
(3) What are minerals ?
Solution:
Minerals are naturally occurring substance which have certain physical properties and definite chemical composition.
(4) How are metamorphic rock formed ?
Solution:
Igneous and sedimentary rocks can change into metamorphic rocks under great heat and pressure. For example, clay changes into slate and limestone into marble.
5.) What is the uppermost layer of the earth?
Solution:
The uppermost layer of the earth is crust.
(6) What are Fossils?
Solution:
The remains of the dead plants and animals trapped in the layers of rocks are called fossils.
(7) Give two examples of sedimentary rocks.
Solution:
(1) sandstone (2) shale
8.) What is the radius of the earth?
Solution:
The radius of the earth is 6371 km.
(9) What is the core of the Earth ?
Solution:
The innermost layer of the Earth is called core.
10.) What is the radius of core?
Solution:
The radius of core is about 3500 km.
(11) What are the three types of rocks on Earth?
Solution:
The three main types are, igneous, sedimentary, and metamorphic.
12.) What is the radius of the earth?
Solution:
The radius of the earth is 6371 km.
13.) What is the depth of the mantle?
Solution:
Mantle extends upto a depth of 2900 km.
Short Answer Type Extra Questions
(1) Explain the main features of the Crust,
Solution:
It is the outermost solid layer of the earth.
It is made up of the lightest materials
It is 35 kms on the conditions masses and 5 km on the oceanic masses
The continental crust is mainly made up of silica and alumina hence called SIAL.
The oceanic crust is made of silica and magnesium hence called SIMA
The crust comprises only 1 percent of the earth’s crust.
(2) Explain the features of Mantle.
Solution:
Mantle is made of the molten rocks
It is 2900 kms deep beneath the crust
The average temperature isn this layer are 2200 degree Celsius
It is made up of denser material.
Mantle comprises 84 percent of the earth’s surface
(3) Explain difference between the extrusive and intrusive igneous rocks
Solution:
When this molten lava comes on the earth’s surface, it rapidly cols down and becomes soild. Rocks form, wed on such a way. On way on the are called extrusive igneous rocks. they have a very fone grained structure. For example , basalt sometimes the molten magma cools down deep inside the earth’s crust. Solid rocks so formed are called intrusive igneous rocks. Since they cool down slowly they form large grains. Granite is an examples of such a rock.
(4) Elaborate on the importance of minerals.
Solution:
Minerals are very important to humankind. Some are used as fuels. For example, coal, natural gas and petroleum. They are also used in industries- iron, aluminium, gold, uranium, etc. In medicine, in fertilizers , etc.
(5) Describe the structure o the earth’s interior .
Solution:
1 The Earth is almost spherical body with a radius of 6,400 km.
2 It interior consists of a central core with several concentric layers surrounding it.
3 The x\core is the densest part, while the outer layer is the least sense
4 there are three main layers- the core, the mantle, and the crust.
(6) How are igneous rocks formed ?
Solution:
Igneous rocks are formed from the cooling and solidification of magma at high temperatures.. the magma comes from deep within our Earth.
Long Answer Type Extra Questions
Source: Diksha
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