Sources Of Energy

key notes :

What is Energy?

• Energy is the ability to do work. It is needed to move, grow, and perform tasks.

Types of Energy Sources

• Natural Sources: Found in nature, such as sunlight, wind, and water.

• Man-made Sources: Created by humans, such as electricity and fuel.

Renewable Energy Sources

Definition: Sources that can be replenished naturally and never run out.

Examples:

• Solar Energy: Energy from the sun.

• Wind Energy: Energy from moving air (wind).

• Hydropower: Energy from flowing water.

• Biomass: Energy from plants and organic materials.

Non-renewable Energy Sources

Definition: Sources that cannot be replenished once used up.

Examples:

• Coal: Black rock used for fuel.

• Oil: Liquid used for making fuels like petrol.

• Natural Gas: Gas used for cooking and heating.

Uses of Energy

• To cook food, light homes, run vehicles, and operate machines.

Importance of Renewable Energy

• Does not pollute the environment.
• Helps conserve non-renewable resources.

Conservation of Energy

Save energy by:

• Turning off lights when not in use.
• Using public transport to reduce fuel consumption.
• Using energy-efficient appliances.

Energy and the Environment

• Renewable sources are eco-friendly.
• Excessive use of non-renewable sources leads to pollution and global warming.

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