Energy generated from tides is called ______________________________

Heat energy obtained from the earth is called ________________________________

Electricity form coal is called ________________________

Coal is therefore referred to as ___________________

Petroleum and its derivatives are called __________________

_________________ is the largest producer of high grade iron-ore in the world.

______________ is the leading producer of iron-ore in the world .

_______________ is rich in mineral resources .

Australia is the largest producer of ________________in the world .

Minerals are a ________________ resources

How many year to form a mineral

_______________ may be broadly categorised as conventional

and Non-conventional resources

_______________ of energy are those which have been in common use for a long time

which is produce sun light energy