NCERT Solutions for Class 10 Science Chapter 14 – Download Free PDF
Chapter 14 science class 10 question answer Sources of Energy - Energy can neither be created nor be destroyed. Such universal facts are explained in Class 10 Science chapter 14 question answer. The solutions contain the answers to the questions given in the NCERT Class 10 science book. Therefore, it is important for students to use class 10 science chapter 14 solutions to know the correct answers and understand the topics well. Each topic is explained in the given solution with the help of well-known examples around us.
This Story also Contains
- NCERT Solutions for Class 10 Science Chapter 14 – Download Free PDF
- NCERT Solutions Class 10 Science Chapter 14 – Sources of Energy
- CBSE NCERT solutions for ch 14 science class 10 sources of energy topic 14.1 What is a good source of energy?
- Solutions of NCERT for class 10 science chapter 14 sources of energy topic 14.2 Conventional sources of energy:
- NCERT solutions for class 10 science chapter 14 sources of energy topic 14.3 Alternative or non conventional sources of energy:
- CBSE NCERT Chapter 14 science class 10 sources of energy topic 14.4 Environmental consequences:
- NCERT solutions for class 10 science chapter 14 sources of energy topic 14.5 How long will an energy source last us?
- Solutions of NCERT for class 10 science chapter 14 sources of energy Exercise:
- CBSE NCERT solutions for class 10 science - chapter wise
NCERT Solutions for Class 10 Science Chapter 14 Sources of Energy NCERT Solutions are an excellent tool for students taking board exams. Sources of energy class 10 questions and answers offer a comprehensive guide to students, allowing them to identify areas where they need improvement and work on overcoming any shortcomings before the exam.
Also, check NCERT Class 10 solutions for other subjects and chapters.
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What is Explained in NCERT Class 10 Science Solutions Chapter 14 Sources of Energy?
Ever wonder what happens when water is boiled at 75 degrees Celcius and is kept in a room where the temperature is 25 degrees Celcius? Such examples are quoted in sources of energy class 10 solutions to make learning better and easier.
NCERT Solutions for Class 10 Science: Important Formulas and Diagrams + eBook link
The "Important Formulas and Diagrams" in NCERT Solutions for ch 14 science class 10 serve as valuable tools for students to quickly revise key concepts and equations. These condensed summaries aid in better retention and reinforcement of essential information. Also, the eBook link provides easy access to the comprehensive NCERT solutions, enabling students to study and practice anytime, anywhere, and at their convenience.
Download Ebook - NCERT Class 10 Science: Chapterwise Important Formulas, Diagrams, And Points
NCERT Solutions for Class 10 Science Chapter 14 Sources of Energy - Important Topics
class 10 science ch 14 solutions, "Sources of Energy," covers topics such as renewable and non-renewable energy sources, including solar, wind, hydroelectric, biomass, geothermal, and fossil fuels. It discusses the importance of conserving energy and future challenges in meeting energy needs sustainably. In the exam, expect questions on renewable energy types, advantages/disadvantages of fossil fuels, energy conservation significance, and future energy challenges. Understanding these topics and sources of energy class 10 questions and answers is crucial for a comprehensive grasp of energy sources and their impact on our world.
Download NCERT Solutions for Class 10 Science Chapter 14 Sources of Energy for free.
As of the latest CBSE Syllabus 2023-24, Chapter 14 "Sources of Energy" has been removed from the Class 10 Science curriculum.
NCERT Solutions Class 10 Science Chapter 14 – Sources of Energy
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CBSE NCERT solutions for ch 14 science class 10 sources of energy topic 14.1 What is a good source of energy?
Q. 1. What is a good source of energy?
Answer:
A good source of energy has the following properties.
(i) It is easily available.
(ii) It is economical.
(iii) Has a high calorific value.
(iv) It's use must not cause pollution.
(v) Must be safe to store and easy to transport.
Q. 2. What is a good fuel?
Answer:
A good fuel has the following properties.
(i) It is easily available.
(ii) It is economical.
(iii) Has a high calorific value.
(iv) It's combustion must not produce any poisonous smoke.
(v) Must be safe to store and easy to transport.
(vi) Has an ignition temperature well above the room temperature.
(vii) Ash or residue must not be produced on combustion.
(viii) The combustion must be easily controllable.
Solutions of NCERT for class 10 science chapter 14 sources of energy topic 14.2 Conventional sources of energy:
Q. 1. What are the disadvantages of fossil fuels?
Answer:
The disadvantages of fossil fuels are the following:
(i) Their combustion produces smoke causing air pollution.
(ii) They produce carbon dioxide on burning which causes green house effect and is therefore responsible for global warming.
(iii) They produce oxides of Sulfur and Nitrogen on burning which cause acid rain.
(iv) Fossils fuels are not a renewable source of energy.
Q. 2. Why are we looking at alternate sources of energy?
Answer:
We are looking at alternate sources of energy primarily because of the following two reasons.
(i) Traditionally used fossil fuels are exhaustible and non-renewable and therefore eventually we would run out of them.
(ii) The burning of fossil fuels causes pollution of the atmosphere, soil and our water bodies and cause global warming which has posed a serious threat to the environment.
Q. 2. What are the limitations of the energy that can be obtained from the oceans?
Answer:
The forms of energy that can be obtained from the ocean are mainly tidal energy, wave energy and thermal energy. The limitations in harnessing these forms of energy are the following
(i) There are very few sites in the world where high tides are regularly present.
(ii) There are very few shores where waves of high kinetic energy reach regularly.
(iii) To harness the ocean's thermal energy the Temperature difference between the surface and the depth must be at least 20 o C. Again such sites are very less.
Q. 3. What is geothermal energy?
Answer:
Energy stored inside the earth in form of thermal energy is called geothermal energy. Due to geological changes the lava present in the core of the earth is pushed towards the surface of the earth thus creating places having extremely high temperature called hot spots.
When water comes in contact with these hot spots high pressure steam is formed which can be used to generate electricity.
Q. 4. What are the advantages of nuclear energy?
Answer:
Nuclear energy has the following advantages:
(i) It's calorific value is much larger than conventional fossil fuels.
(ii) By regulating rate of nuclear fission energy can be generated at very high rate.
(iii) Nuclear fission does not form any smoke.
(iv) Once fully loaded a nuclear reactor can produce high amounts of energy for very long time at a stretch without having to be reloaded.
CBSE NCERT Chapter 14 science class 10 sources of energy topic 14.4 Environmental consequences:
Q. 1. Can any source of energy be pollution-free? Why or why not?
Answer:
No source of energy can be completely pollution free.
Even if the production of energy through a source does not harm the environment the formation of the assembly required to harness the energy would cause some minimal amount of pollution e.g. Solar energy, Hydro energy.
NCERT solutions for class 10 science chapter 14 sources of energy topic 14.5 How long will an energy source last us?
Q. 1. Name two energy sources that you would consider to be renewable. Give reasons for your choices.
Answer:
The following sources of energy are renewable:
(i) Wind energy is renewable as winds will be moving as long as the normal behavior of the weather and our environment persists.
(ii) Hydro energy is renewable as hydro energy can be harnessed as long as the flowing water bodies like rivers and waterfalls exist.
Solutions of NCERT for class 10 science chapter 14 sources of energy Exercise:
Q. 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:
A solar water heater cannot be used to get hot water on a cloudy day as much sun light won't be present for energy to be harnessed.
(b) is the correct answer.
Q. 4. Compare and contrast fossil fuels and the Sun as direct sources of energy.
Answer:
Both fossil fuels and solar energy are direct sources of energy but have the following differences between them.
| Fossil Fuels | Solar Energy |
| (i) Non-renewable source of energy. | (i) Renewable source of energy. |
| (ii) Economical. | (ii) Expensive to harness. |
| (iii) Pollutes the environment. | (iii) Is environment friendly. |
| (iv) They are exhaustible. | (iv) Solar energy is non-exhaustible. |
| (v) Fossil fuels are available throughout the year. | (v) Solar energy can be harnessed only on sunny days. |
Q. 5. Compare and contrast bio-mass and hydro electricity as sources of energy.
Answer:
| Biomass | Hydro electricity |
| (i) Renewable source of energy. | (i) Renewable source of energy. |
| (ii) Biomass plants can be installed anywhere. | (ii) Hydro power plants can be installed only in fast flwoing water bodies. |
| (iii) Not very economical to collect the organic waste (biomass) required. | (iii) Once the plant is set up harnessing of energy is very economical. |
Q. 6(a). What are the limitations of extracting energy from (a) the wind?
Answer:
Wind mill farms can be set only at places where fast flowing winds are present throughout the year and such sites are very less.
Also the setting up of wind mill farms is a very expensive process and requires large areas of land.
Q. 6(c). What are the limitations of extracting energy from (c) tides?
Answer:
Energy from tides can be efficiently harnessed at very few sites as there are very less places where high energy tides are present throughout the year.Setting up of the tidal dams is also an expensive process and the energy harnessed is also not very large.
Q. 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:
(a) The sources of energy that are replenished by the nature are called renewable sources and those which are not replenished by the nature are called non-renewable sources of energy.
(b) The sources of energy that are present in a limited quantity and would get over after some time are callued exhaustible sources of energy and those which are available in infinite amount by the virtue of nature are called inexhaustible sources of energy.
The options given in (a) and (b) are the same.
Q. 8. What are the qualities of an ideal source of energy?
Answer:
An ideal source of energy should have the following properties:
(i) Must be providing sufficient quantities of energy.
(ii) Must be economical to harness.
(iii) Must not cause pollution of the environment.
(iv) Must be easy, cheap and safe to store and transport.
Q. 10. What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?
Answer:
Some of the environmental consequences of the ever-increasing demand for energy are the following:
(i) Combustion of fossil fuels is causing air pollution, acid rain and global warming.
(ii) Buiding of hydropower plants disturbs the ecological balance of the water bodies and aquatic organisms.
(iii) The ever increasing demand of firewood has severely decreased the forest area causing global warming.
(iv) Use of nuclear sources poses the risk of radioactivity caused by nuclear waste.
Some of the steps that could be taken to reduce energy consumption are.
(i) Switching off the lights, fans, air-conditioners etc. when not in use.
(ii) Using efficient electrical appliances.
(iii) Using a bicycle or public mode of transport to reduce the consumption of fossil fuels.
Sources of Energy Class 10 NCERT Topics
You are going to study the following topics in this Sources of Energy class 10 Science NCERT Solutions chapter 14:
What is a good source of energy?
Conventional sources of energy
Alternative or non-conventional sources of energy
Environmental consequences
How long will an energy source last us?
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NCERT Solutions for Class 10 - Subject Wise
Types of Questions in NCERT Solutions Class 10 Science Chapter 14 for Board Exams:
Generally, 4 types of questions are asked in the class 10 science board exam i.e. very short answer type, short answer type, long answer type and practical-based questions which are for 1 to 5 marks.
In 2017 and 2018, 1 mark questions, generally, 1 or 2, have been asked from this chapter.
Studying solutions of NCERT for class 10 science chapter 14 sources of energy becomes extremely important as class 10 is the board class where even 1 mark can make a big difference.
NCERT Class 10 Science Solutions Chapter 14 - Weightage in Board Exams
class 10 science chapter 14 question answer hold a weightage of 1 mark in the board exams. In the previous year's examination, a single question was asked from this chapter. It is essential for students to study this chapter thoroughly and be well-prepared for the examination to score well in this section.
Benefits of Sources of Energy Class 10 Solutions
These CBSE NCERT solutions for Class 10 Science chapter 14 are detailed which explain all the answers of questions related to Sources of Energy.
Students can use ch 14 science class 10 solution to understand the concepts as well as learn how to answer questions in the board exams.
Since practice is an essential part of your board exam preparation, check the questions asked in the CBSE Class 10 previous papers from this chapter.
Students can then use the sources of energy class 10 questions and answers to know the answers. If the same questions or similar ones are asked, they will be able to answer them.
However, NCERT Class 10 Science chapter 14 pdf download will be available soon. But till then, you can download them as a webpage file to access NCERT 10th Science chapter 14 solutions.
How to Access NCERT Solutions for Class 10 Science Chapter 14?
To access class 10th science chapter 14 question answer "Sources of Energy," follow these steps:
- Scroll down or navigate to the section related to Class 10 Science Solutions.
- Look for the specific chapter "Sources of Energy" in the list of chapters available for Class 10 Science.
- Click on Chapter 14 - "Sources of Energy" to access the solutions for this chapter.
- The solutions will be provided in the form of text or PDF format, and you can use them to study and solve numerical problems related to Sources of Energy in Class 10 Science.
Also Check NCERT Books and NCERT Syllabus here:
CBSE NCERT solutions for class 10 science - chapter wise
NCERT Science Exemplar Solutions Class 10 - Chapter Wise
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