Students should read Chapter 14 Sources of Energy Class 10 Science Notes provided below. These notes have been prepared based on the latest syllabus and books issued by NCERT, CBSE and KVS. These important revision notes will be really useful for students to understand the important topics given in the chapter Sources of Energy in Class 10 Science. We have provided class 10 science notes for all chapters.

Revision Notes Chapter 14 Sources of Energy Class 10 Science

Chapter 14 Sources of Energy is an important chapter in Class 10 Science. The following notes will help you to understand and easily learn all important points to help you score more marks.

1. Our energy requirements increase with our standard of living.

2. Characteristics of good source of energy.

• High efficiency
• easy to use
• easy to store and transport
• economical
• easily accessible.

3. Fossil fuels are non-renewable/exhaustible/causes air pollution, acid rain and global warming.

4. Biogas is formed by the decomposition of cow dung, agricultural and domestic wastes.

5. Advantages of bio gas :

• Pollution free
• Wealth from wastes
• No residue
• high efficiency.

6. Wind energy : Kinetic energy of the wind is used to do the useful work.
Advantages:

• Renewable
• Inexhaustible
• Pollution free
• No residue.

Disadvantages:

• High cost of installation
• Minimum wind speed 15km/h
• Maintenance cost high
• requirement of large area of land.

7. Solar cells are devices which convert light energy into electric energy.
Advantages:

• Inexhaustible
• Pollution free
• Used in artificial satellites
• Can be used in remote areas
• low cost of maintenance.

Disadvantages:

• Requirement of special grade of silicon
• High cost of installation
• Moderate efficiency.

8. In nuclear power plants, nuclear energy is used for the production of electricity.
Advantage: Very high efficiency
Disadvantage:

• Radioactive emissions
• Fear of nuclear power plant accidents
• Disposal of Radioactive wastes.