Renewable forms of energy

Definition

Renewable forms of energy are sources of power that can be replenished naturally within a human lifespan. These include solar, wind, hydroelectric, geothermal, and biomass energy.

5 Must Know Facts For Your Next Test

1. Renewable energy sources are considered more sustainable than fossil fuels because they produce less greenhouse gas emissions.
2. Solar energy harnesses power from the sun using photovoltaic cells or solar thermal systems.
3. Wind energy is generated by converting the kinetic energy from wind into mechanical power using turbines.
4. Hydroelectric power is produced by capturing the energy from flowing water, usually via dams.
5. Geothermal energy exploits heat from within the Earth to generate electricity or provide direct heating.

Review Questions

• What are the main types of renewable forms of energy?
• How does wind energy convert kinetic energy into electrical power?
• Why are renewable forms of energy considered more sustainable compared to fossil fuels?

Related terms

Photovoltaic Cells: Devices that convert sunlight directly into electricity through the photovoltaic effect.

Turbine: A machine for generating rotary mechanical power from the flow of fluid such as water, steam, or air.

Greenhouse Gas Emissions: Gases released into the atmosphere that trap heat and contribute to global warming and climate change.