Glossary & Important definitions for class 8 Geography Chapter 3 , Mineral and Power Resources.
Answers
Answer:
Mineral and Power Resources. Minerals: A naturally occurring substance which has a definite chemical composition is called mineral. Minerals can be identified on the basis of their physical properties and chemical properties. Ore: A rock from which a particular mineral can be profitably extracted is called ore.
what are minerals ?
All Rock contains crystals of naturally occurring chemical substances are known as minerals.
what is drilling ?
the process of extraction of minerals in which narrow but very deep wells are bored to extract liquid and gaseous like petroleum and natural gas.
what is electrical grid ?
it is an interconnected network for delivering electricity from suppliers to consumers.
what is open cast mining ?
the extraction of different minerals from just below the ground surface by removing the surface layers.
what is perennial river ?
a river that has continuous flow all the year round.
what is shaft mining ?
the extraction of minerals from under the growth by sinking of vertical shaft into the ground and then cutting horizontal tunnels to reach one or more minerals that lie at great depth.