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Test: Inside Our Earth - UPSC MCQ


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10 Questions MCQ Test Geography for UPSC CSE - Test: Inside Our Earth

Test: Inside Our Earth for UPSC 2024 is part of Geography for UPSC CSE preparation. The Test: Inside Our Earth questions and answers have been prepared according to the UPSC exam syllabus.The Test: Inside Our Earth MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Inside Our Earth below.
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Test: Inside Our Earth - Question 1

Thinnest layer of the earth is

Detailed Solution for Test: Inside Our Earth - Question 1

The thinnest layer of the earth is Crust. It is about 35 km on continental masses & 5 km on ocean floors.

Test: Inside Our Earth - Question 2

______ minerals are found in the continental masses.

Detailed Solution for Test: Inside Our Earth - Question 2

The main mineral constituents:
(i) Continental mass are silica and alumina. It is thus called sial (si-silica and al-alumina).
(ii) The oceanic crust mainly consists of silica and magnesium; it is therefore called sima (si-silica and ma-magnesium).

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Test: Inside Our Earth - Question 3

What is the name of the rock which contains fossils?

Detailed Solution for Test: Inside Our Earth - Question 3

There are three main types of rock:
(i) Igneous rocks form from molten rock, and rarely have fossils in them.
(ii) Metamorphic rocks have been put under great pressure, heated, squashed or stretched, and fossils do not usually survive these extreme conditions.
(iii) It is only sedimentary rocks that contain fossils.

Thus, option A is correct.

Test: Inside Our Earth - Question 4

The innermost layer of the earth is

Detailed Solution for Test: Inside Our Earth - Question 4

The innermost layer of the earth is known as the core, divided into inner core and outer core.
It comprises of a high concentration of nickel and iron.
Composition of the Earth: (Structure + Layers + Facts) - Science4Fun

Test: Inside Our Earth - Question 5

The inner and outer cores are together about 3500 km thick, and the core has a very high temperature and pressure. Why is the core also known as NiFe?

Detailed Solution for Test: Inside Our Earth - Question 5

The core is the innermost layer, divided into the outer core and the inner core.
It is mainly made up of Nickel and Iron, therefore, it is also called nife.
Its radius is about 3500 km and the temperature and pressure of the central core are very high.

Test: Inside Our Earth - Question 6

Fossils are the remains of dead _______

Detailed Solution for Test: Inside Our Earth - Question 6

A Fossil is any preserved remains, impression, or trace of any dead organism which was living in the past from a different geological age.
Example: Bones or stone imprints of animals or microbes, exoskeletons, shells, objects preserved in petrified wood, oil, coal, and DNA remnants.

The study of fossils is known as “Palaeontology”. This includes the study about their age, the method of formation, and evolutionary significance. If the age or time of some specimens is over 10,000 old years, they are considered to be fossils.

Thus, option C is correct.

Test: Inside Our Earth - Question 7

There are three major types of rocks except

Detailed Solution for Test: Inside Our Earth - Question 7

There are three main types of rock: Igneous Rocks, Metamorphic Rocks, and Sedimentary Rocks.

The mantle is the most solid bulk of Earth's interior that lies between core and crust.

Test: Inside Our Earth - Question 8

What type of rocks are formed when molten lava cools down rapidly on the earth's surface?

Detailed Solution for Test: Inside Our Earth - Question 8
  • When fiery red molten lava comes out from the interior of the earth and cools down quickly on the earth's surface, it forms rocks called extrusive igneous rocks. These rocks have a very fine-grained structure. An example of extrusive igneous rock is basalt. So, when you see lava cooling fast and forming rocks like basalt, you're looking at extrusive igneous rocks.
Test: Inside Our Earth - Question 9

State whether the following statement is True or False:

The Deccan plateau is made up of sedimentary rocks.

Detailed Solution for Test: Inside Our Earth - Question 9

Sedimentary rocks are formed from the accumulation and compression of sediments over time. The Deccan plateau, known for its extensive basalt formations, is primarily composed of igneous rocks, particularly basalt, which are formed from solidified lava. So, the statement is False.

Test: Inside Our Earth - Question 10
What is a rock?
Detailed Solution for Test: Inside Our Earth - Question 10
A rock is a naturally occurring solid mass of mineral matter that makes up the Earth’s crust. Rocks come in various types, textures, sizes, and colors.
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