MEANINGS / DEFINITIONS :
Rock – The solid minerals forming part of the surface of the earth
Ore – A rock from which minerals are mined .
Ferrous minerals – Ones containing iron as a constituent .
Petroleum – Thick layer liquid fossil fuel .
Solar energy – Heat and light energy captured from the sun .
Wind energy – Energy possessed by moving air .
Geothermal energy – Energy obtained from inside of the earth .
Tidal energy – Energy generated from tides .
Metallic minerals − minerals that contain metals
Drilling − a form of extraction
Quarrying − removing minerals by digging on the top layers o the soil
Extraction − process of removing something
Thermal power − electricity obtained from coal
Nuclear − energy possessed by the nuclei of an atom
Geothermal − heat energy got from inside the earth
Hydel − energy possessed by river water
Mining − extraction of mineralsfrom under the earth
Biogas − gas got by decoposition of organic waste