Petrology — 6 World Geography PYQs with Answers | UKPSC PYQ Hub

Question 1

Epeirogenic forces are result of:

Accepted Answer

Vertical earth movements. Epeirogenic force is the result of perpendicular movement of the Earth. This is also called continental movement (Epeirogenic Movements) Due to this movements the processes of upliftment and subsidence and movement and submergence take place in the continents. Both these actions are the results of the vertical movements of the Earth. Geography of the World

Question 2

Coal is an example of–

Accepted Answer

Sedimentary Rocks. Coal is an example of sedimentary rock. Sedimentary rocks are found because of deposition of fragments of rocks by exogenous process. Sedimentary rocks are classified into three major groups: (i) mechanically formed e.g. sandstone, conglomerate, limestone, shale, loess etc. (ii) organically formed e.g. geyserite, chalk, limestone, coal etc. (iii) chemically formed e.g. chert, limestone, halite, potash etc.

Question 3

Which one of the following is not an example of Metamorphic Rocks?

Accepted Answer

Granite. Metamorphic rocks are formed when rocks are subjected to high heat, high pressure. Common metamorphic rocks include phyllite, schist, gneiss, quartzite and marble. White granite is an example of Igneous rocks.

Question 4

The molten substance present inside earth's core is known as–

Accepted Answer

None of these. The molten substance present inside earth's core is known as Magma. Lava is actually fiery red molten magma coming out from the interior of the earth on its surface. When this molten lava comes on the earth’s surface, it rapidly cools down and becomes solid.

Question 5

Marble is –

Accepted Answer

Reformed limestone. Igneous and sedimentary rocks can change into metamorphic rocks under great heat and pressure. For example, clay changes into slate and limestone into marble.

Question 6

Which one of the following is not associated to the ‘group’?

Accepted Answer

Gneiss. - Gneiss are metamorphic rock formed by changing schist, granite or volcanic rock through intense heat and pressure, whereas sandstone limestone and shale are example of sedimentary rocks. Mountains, Plateaus and