UNIT 4 NATURAL: SOURCE OF ENERGY

Energy can be renewable or non-renewable.

Renewable energy is energy obtained from sources that are unlimited.

Hydroelectric energy: We get hydroelectric energy from water that is moving or falling. The water is collected in a reservoir. Then it passes through a turbine that generates electricity.

Wind energy: We get wind energy from the movement of air. The kinetic energy of the wind turns a turbine, and produces electrical energy.

Solar energy: We get solar energy from the Sun in the form of light and heat. Solar panels transform that energy into electrical energy.

Biofuels: We get biofuels from plant and animal products. Biofuels can be solid (biomass), liquid (bioliquids) or gas (biogases). Biofuels are burned in power stations to produce electrical energy or heat.

Non-renewable energy sources energy from sources that are limited.

Uranium: This radioactive metal is used in nuclear power stations to produce heat in nuclear reactions. Electricity is produced from this heat.

Natural gas Natural gas is a mixture of gases that have formed from decayed living things. It’s found underground. Natural gas is used as a fuel in many industries and to produce electricity. It’s used in homes for heating and cooking.

Coal is formed underground from decayed plants. Coal is used as fuel and to produce electricity in coal-burning power stations.

Petroleum This black liquid forms from decayed plants and animals. It’s the source of fuel that we use for heating and running vehicles and to produce electricity in oil-burning power stations.

https://www.eia.gov/kids/games-and-activities/