Q16 of 269 Page 148

What is biomass? Give three examples of biomass.

Biomass is fuel that is developed from organic materials, a renewable and sustainable source of energy used to create electricity or other forms of power. Examples of biomass include landfill gas, wood, crops, garbage and alcohol fuels.


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14

State whether the following statement is true or false:

Tidal energy is one of the forms in which solar energy manifests itself in oceans.

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Fill in the following blanks with suitable words:

(a) Biomass is another form in which .......... energy manifests itself.


(b) Tidal waves build up and recede .............. a day.

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Name the biomass which is still widely used as a source of heat energy in many households of country.

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What are the two ways in which cow-dung can be used as a fuel? Which of them is better and why?