Mission UPSC

14/08/2023

21/05/2023

14/05/2023

■ CHARACTERSTICS OF IGNEOUS ROCKS



◇ The igneous rocks are roughly hard rocks and water percolates with great difficulty along the joints.

◇ Igneous rocks are granular or crystalline rocks but there are much variations in the size, form and texture of grains because these properties largely depend upon the rate and place of cooling and solidification of magmas or lavas.

• when the lavas are quickly cooled down and solidified the surface of the earth, there is no sufficient time for the development of grains/crystals.

• If Magmas are cooled and solidified at a very slow rate inside the earth, there is sufficient time for the full development of grains, and thus the resultant igneous rocks are characterized by coarse grains.

23/11/2022

...

12/11/2022

Eleventh five year plan (2007 -2012)

Trick : TEACHERS

T - Telecommunicatons (2G)

E - Electricity, Environment Science

A - Anemia

C - Clean water

H - Health education

E - Environment Science

R - Rapid growth

S - Skill Development