Question

Compare and contrast bio-mass and hydro electricity as sources of energy.

Answer 1

Biomass is the energy derived from remains of living organisms such dry leaves, agricultural waste, wood shavings etc. and animal excreta such as cow dung.It is a renewable source of energy.The devices used for utilizing bio mass (chullahs, biogas plants) can be installed at all places.The use of bio-mass produces a lot of smoke.It is used for cooking, illumination etc.

Hydroelectricity is producing by the potential energy of water at height.It is also a renewable source of energy.It requires construction of dams on rivers and its plants can be built only at few places.It requires a huge investment but it is pollution free.The electricity produced can be used to run all type of electric appliances.

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Answer 2

Compare and contrast bio-mass and hydro electricity as sources of energy.

Biomass as sources of energy

• The organic material which is obtained from source such as plants and animal, it is called as biomass.
• As they are continuously available, they are considered as renewable source of energy.
• The chemical energy present in the biomass is converted into heat energy and is used as fuel for burning in various domestic as well as industrial activities.
• Substances such as animal manure, human waste, agricultural waste etc are few examples of biomass.

Hydro-electricity as source of energy

• The electric current which is obtained from water and its power, it is called as hydro-electricity.
• It is also a form of renewable energy as it is obtained from renewable source water.
• It is clean and has no side effects.
• This energy is used for domestic electricity, the water stored in dam can be used for large scale irrigation purpose.

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