Fossils are found in _________ .

Fossil fuel contains mostly the compounds of _________

 Fuel formed from the dead remains of plants and animals buried for millions of years     

The name of petroleum means oil of ____________

This is not an alternative source of energy

The energy from water is called _________ energy.

Name the major constituents of coal gas

Natural gas is a ________ .      

_________ is the preserved remains of dead organisms from past geological ages.

Petroleum is also called _________