{"id":949,"date":"2024-07-08T10:11:30","date_gmt":"2024-07-08T09:11:30","guid":{"rendered":"https:\/\/learnnest.in\/?p=949"},"modified":"2024-07-08T10:13:35","modified_gmt":"2024-07-08T09:13:35","slug":"9-energy-resources","status":"publish","type":"post","link":"https:\/\/learnnest.in\/index.php\/2024\/07\/08\/9-energy-resources\/","title":{"rendered":"9: Energy Resources"},"content":{"rendered":"\t\t
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Energy Resources Q & A<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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(A) What resource will have to be used for the following work:<\/strong><\/p>

(1) Rohan wants to fly a kite.
Ans:<\/strong> Wind.<\/p>

(2) People in an Adivasi hamlet have to be protected from the cold.
Ans:<\/strong> Wood.<\/p>

(3) Cooking on a picnic.
Ans:<\/strong> Wood.<\/p>

(4) Salma wants to iron her clothes.
Ans:<\/strong> Electricity.<\/p>

(5) Starting a railway-engine.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
Ans:<\/strong> Thermal Energy.<\/p>

(6) Heating water for a bath.
Ans: <\/strong>Electricity.<\/p>

(7) After sunset, making light available inside the house.
Ans:<\/strong> Electricity.<\/p>

(B) Answer the following questions:<\/strong><\/p>

(1) Which energy resources does man use the most? Why?
Ans:<\/strong> Coal is the energy resources that man uses the most because it is comparatively easily available everywhere in greater quantities.<\/p>

(2) Why are energy resources needed?<\/strong>
Ans:<\/strong> The energy resources are needed to satisfy the needs of man like heating water, cooking food, ironing dress, etc.<\/p>

(4) Why do we need to use environment friendly energy resources?<\/strong>
Ans:<\/strong> We need to use environment-friendly energy resources because it will not only lead to sustainable development but also provide energy security which is the need of the hour.<\/p>

\u00a0<\/p>

(C) Explain the differences using the points in the brackets:<\/strong>
(availability, environment-friendliness,advantages and drawbacks)<\/strong><\/p>

\u00a0<\/strong><\/p>

(1) Mineral oil and solar energy
Ans:<\/strong><\/p>

Points<\/strong><\/p><\/td>

Mineral oil<\/strong><\/p><\/td>

Solar energy<\/strong><\/p><\/td><\/tr>

Availability<\/strong><\/p><\/td>

(1) Limited in nature as it does not last perpetually.<\/p><\/td>

(1) Availability depends on the<\/p>

\u00a0intensity of sunrays and the<\/p>

duration of sunshine.<\/p><\/td><\/tr>

Environment-friendliness<\/strong><\/p><\/td>

(1)\u00a0 It is not environment friendly as its generation leads to pollution.<\/p>

(2)\u00a0 Being highly inflammable it may cause damage to the environment.<\/p><\/td>

(1) Being pollution-free this is<\/p>

an environment-friendly<\/p>

source of energy.<\/p><\/td><\/tr>

Advantages<\/strong><\/p><\/td>

(1)\u00a0 Cheap source of energy.<\/p>

(2)\u00a0 Aids in thermal and atomic power generation.<\/p><\/td>

(1)\u00a0 A solution to global warming.
(2)\u00a0 Cost effective, provides<\/p>

energy security.<\/p><\/td><\/tr>

Drawbacks<\/strong><\/p><\/td>

(1)\u00a0 Pollutes the environment.<\/p>

(2)\u00a0 Highly inflammable.<\/p><\/td>

(1)\u00a0 Solar panels stop producing<\/p>

electricity after sunset.<\/p>

(2)\u00a0 Expensive to store this energy.<\/p><\/td><\/tr><\/tbody><\/table>

\u00a0<\/p>

(2) Hydel power and power from geothermal source
Ans:<\/strong><\/p>

Points<\/strong><\/p><\/td>

Hydel power<\/strong><\/p><\/td>

Power from geothermal sources<\/strong><\/p><\/td><\/tr>

Availability<\/strong><\/p><\/td>

(i) Obtained from the kinetic energy of running water which is easily available.<\/p><\/td>

(i) Underground heat is utilized to<\/p>

generate power and it is<\/p>

inexhaustible.<\/p><\/td><\/tr>

Environment-friendliness<\/strong><\/p><\/td>

(i) Does not cause any degradation of the environment.<\/p><\/td>

(i) It is an exhaustible energy<\/p>

resource that causes minimum<\/p>

pollution.<\/p><\/td><\/tr>

Advantages<\/strong><\/p><\/td>

(i) Reuse of water is possible. Easy availability of water in most places. Energy generation is pollution-free.<\/p><\/td>

(i) If used on a large scale and more<\/p>

efficiently it may reduce global<\/p>

warming.<\/p><\/td><\/tr>

Disadvantages<\/strong><\/p><\/td>

(i) When water is not available it can\u2019t produce electricity.
(ii) Humans, flora, and fauna may lose natural habitat when hydel power plants are set up.<\/p><\/td>

(i) Only a few sites have the<\/p>

potential to establish geothermal<\/p>

power plants.<\/p>

(ii) High installation cost is involved.<\/p>

(iii) The energy generation capacity<\/p>

is too small.<\/p><\/td><\/tr><\/tbody><\/table>

\u00a0<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

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