Energy:slc short questions answers

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1. What are the dis­ad­van­tages of fos­sil fuels?

- They releases toxic gases like , CO (car­bon monox­ide),  (Sul­phur diox­ide) which can change the global cli­mate.
- They also comes in con­tact with water and forms acid which cause envi­ron­men­tal hazards.

2. Write 1 advan­tage and dis­ad­van­tage of nuclear energy?

A  dvan­tage: It is used to make nuclear weapons and a nuclear fuel dur­ing nuclear fission.

Dis­ad­van­tage: Harm­ful nuclear waste is pro­duced dur­ing nuclear reac­tion which destroy aquatic life.

3. What causes nuclear fusion reac­tion in the sun?

   Pres­ence of plenty of hydro­gen, suf­fi­cient tem­per­a­ture and high pres­sure on the inner core of the sun cause nuclear fusion reac­tion in the sun.

4. State mass energy relation.

“When a part of mass is lost dur­ing nuclear reac­tion, the lost mass gets con­verted into energy” This rela­tion is known as mass — energy relation.

5. Geot­her­mal energy can be used as alter­na­tive source of energy. Why?

Geot­her­mal energy can be used as alter­na­tive source of energy because this energy is orig­i­nated from the cer­tain geo­log­i­cal part of the earth’s crust.

6. Nepal has high poten­tial­ity for pro­duc­ing hydro­elec­tric­ity how­ever dif­fi­cult to pro­duce it. Why?

Nepal has high poten­tial­ity for pro­duc­ing hydro­elec­tric­ity how­ever dif­fi­cult to pro­duce it because of lack of man­power and money.

7. The devel­op­ment of hydro-power helps to reduce energy cri­sis further.

The devel­op­ment of hydropower helps to reduce energy cri­sis fur­ther because of the fol­low­ing reasons:

* It is a renew­able source of energy which is never depleted.

* It does not cause any envi­ron­men­tal pollution.

8. Renew­able source can be an alter­na­tive to non-renewable sources.

If non renew­able sources of energy are exhausted, they can not be brought back to their orig­i­    nal state and can cause energy cri­sis but not by renew­able source of energy so renew­able source of energy can be an alter­na­tive to non-renewable sources.

9. Energy of fos­sil is also derived from the solar energy.

Energy of fos­sil is also derived from the solar energy because the fos­sil fuel is formed by the   decom­po­si­tion of the dead bod­ies of plants and ani­mals occurs which is caused due to solar energy.