Question

Describe different sources of heat energy.

Answer 1

The different sources of heat energy are the sun, earth, wood and biomass, coal and petroleum.

1. The Sun: The primary source of heat energy on the earth's surface is the sun. Heat and light energy is produced because of the fusion of hydrogen atoms in sun.
2. Earth: We can produce superheated steam by pumping water from deep inside of the earth in a volcanic region. This superheated steam can be used as heat energy for various purposes.
3. Wood and Biomass: Heat energy can be produced from wood and biomass by burning them. Dried leaves, cow dung, or any other non-usable products of animals and vegetables are the constituents of biomass. Biomass can be converted into combustible gases such as methane, which on combustion will give us heat energy.
4. Coal and Petroleum: The forests got buried under the earth's surface, got converted into coal or petroleum due to the slow action of heat and pressure in the earth. Coal and petroleum produces heat energy on burning.