Energy Resources
Class 6th-Geography-Chapter-9
Solutions
Question A. What resource will have to be used for the following work –
(1) Rohan wants to fly a kite.
Wind
(2) People in an Adivasi hamlet have to be protected from the cold.
Wood
(3) Cooking on a picnic.
Wood, Coal etc.
(4) Salma wants to iron her clothes.
Electricity.
(5) Starting a railway-engine.
Electricity, Coal etc.
(6) Heating water for a bath.
Electricity, Coal, Wood, Biogas etc.
(7) After sunset, making light available inside the house.
Oil, Electricity etc.
Question B. Answer the following questions.
(1) Which energy resource does man use the most? Why?
(2) Why are energy resources needed?
(3) Why do we need to use environment friendly energy resources?
Question C. Explain the differences using the points in the brackets.
(availability, environment-friendliness, advantages and drawbacks)
(1) Mineral oil and solar energy
Mineral oil
Solar energy
Availability
Limited
Unlimited
Environment-friendliness
Not environment friendly
Environment friendly
Advantages and drawbacks
The use of mineral oil leads to pollution
The use of solar energy is pollution-free
(2) Hydel power and power from geo-thermal source.
Hydel power
Power from Geo-thermal
Availability
Comparatively limited
Unlimited everywhere.
Environment-friendliness
Comparatively environment friendly
Less environment friendly
Advantages and drawbacks
The cost of power generation using hydel power is comparatively low.
The cost of power generation using power from geo-thermal source is comparatively high.
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Chapter-9-Energy Resources-Notes
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