mineral resources

Question 1

minerals

Answer 1

inorganic natural substances and one of the natural resources of a country. they are obtained from under the surface of the earth.

Question 2

open cast mining

Answer 2

some minerals like coal and iron often lie near the surface. open cast mining scoops up these minerals from near the surface. the mineral-bearing rocks are stripped off by giant excavators and power shovels, which then load the material into lorries or railway wagons to be carried away.

Question 3

mining

Answer 3

is the process of digging minerals and rocks from the earth.

Question 4

adit mining

Answer 4

an adit is an opening or passage. adit mining is done in hilly districts where a mineral seam is exposed on a hillside.
horizontal tunnels to mineral layer/seam-removed from tunnels
expensive and dangerous