Class 10 Science Chapter 14 NCERT Solution

Chapter 14 of Science Subject of Class 10 is “Sources of Energy” .NCERT Solutions (Intext and End Exercise Questions) for Science Chapter 14 are provided on this page.

Class 10 Science Chapter 14 – Sources of Energy

Science Chapter 14 of Class 10 NCERT Text book is “Sources of Energy”. The end exercise of this chapter consists of a total of 10 questions. These end exercise questions are related to energy , its sources, solar energy , wind energy , etc

Chapter 14 : Sources of Energy ( NCERT Solutions )

SubjectScience
Class 10
Chapter Chapter 14 : Sources of Energy
Study MaterialNCERT Solutions ( End Exercise and Intext Questions )
Total Questions 10 Questions
Text BookNCERT Text Book ( Updated Syllabus)

Class 10 Science Chapter 14 Question 1 :
A solar water heater cannot be used to get hot water on

(a) a sunny day.
(b) a cloudy day.
(c) a hot day.
(d) a windy day.

Answer and Explanation : Option [b] a cloudy day is the correct answer.
A solar water heater cannot be used to get hot water on a cloudy day.

Class 10 Science Chapter 14 Question 2 :
Which of the following is not an example of a bio-mass energy source?

(a) wood
(b) gobar-gas
(c) nuclear energy
(d) coal

Answer and Explanation : Option [c] nuclear energy is the correct answer.
Nuclear energy is not an example of a bio-mass energy source.

Question 3 :
Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?

(a) geothermal energy
(b) wind energy
(c) nuclear energy
(d) bio-mass.

Answer and Explanation : Option [c] Nuclear Energy is the correct answer.
Nuclear Energy is not ultimately derived from the sun’s energy.

Class 10 Science Chapter 14 Question 4 :
Compare and contrast fossil fuels and the Sun as direct sources of energy.

Answer and Explanation : Comparison and Contrast between Fossil fuel energy and Sun as a source of energy

Fossil FuelsSun
It is a non renewable resource It is a renewable resource
Fossil fuels are formed due to the sun onlyIt is the ultimate source of fossil fuel
They cause pollutionIt gives pollution free environment.

Class 10 Science Chapter 14 Question 5 :
Compare and contrast bio-mass and hydro electricity as sources of energy

Answer and Explanation : Comparison and Contrast between Bio mass and Hydro electricity as a source of energy.

Bio MassHydroelectricity
It is a renewable source of energy.It is also a renewable source of energy.
It cause less pollutionThey are pollution free.
They are cheapThey are costly
They doesn’t cause ecological imbalanceThey cause ecological balance

Class 10 Science Chapter 14 Question 6 :
What are the limitations of extracting energy from— (a) the wind? (b) waves? (c) tides?

Answer and Explanation :
(a) Wind
1. The wind required for generating electricity should be strong of about 15 km/hr.
2. Wind energy farms cannot be established everywhere. They can be established at those places where wind blows for moat part of the year
3. The setting up of Wind farms is very expensive

(b) Waves
1. The wave is not available every time for generating electricity .
2. It is costly to setup device to trap wave energy.
3. Wave energy would be a viable proposition only where waves are very strong.

(c) tides
1. The locations for constructing dams for harnessing tidal energy is limited .
2. It is costly to harness energy from tides

Class 10 Science Chapter 14 Question 7 :
On what basis would you classify energy sources as (a) renewable and non-renewable? (b) exhaustible and inexhaustible? Are the options given in (a) and (b) the same?

Answer and Explanation :
(a) If the source of energy can be replenished within in a short period of time, then it is called a renewable resource.
If the source of energy can’t be replenished again then it is called non renewable resource.

(b) If the source of energy can be exhausted in a reasonable time, then it is called an exhaustible resource .
Some source of energy cannot be exhausted , these are called as inexhaustible resource .

Class 10 Science Chapter 14 Question 8 :
What are the qualities of an ideal source of energy?

Answer and Explanation : The qualities of an ideal source of energy are –
1. It should give large amount of energy per unit volume of mass .
2. It should be pollution free.
3. It should be easily accessible .

Class 10 Science Chapter 14 Question 9 :
What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?

Answer and Explanation :
Advantages of a Solar Cooker
1. It cooks food without causing any kind of pollution .
2. It is economical to use a solar cooker .
3. Nutritious values of food remain same .
4. It is easy to handle solar cooker because there is no chance of accident.

Disadvantages of Solar Cooker
1. Solar cooker can’t be used at night and cloudy weather.
2. It takes more time to cook food in a solar cooker .
3. It can not be used for making chapatis and frying .

Yes, there are some places where solar cookers would have limited utility.

Question 10 :
What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?

Answer and Explanation :
The consequences of the increasing demand for energy are as under –
1. The increase of energy make the successive exploitation of resources of energy distributed ecological balance.
2. The increasing demand of energy makes excessive use of source of energy which are limited and giving rise to energy crisis in the future.

Steps to Reduce Energy Consumption
1. The judicious use of energy and avoiding misuse of energy can reduce the energy consumption.
2. The alternative source of energy like wind and solar energy should be used.