1. Energy Sources: Part 2 Energy Sources: Part 2 Renewable Sources of Energy Renewable Sources of Energy

2. What is a renewable energy source? An energy source is renewable if it is constantly being supplied. What is a renewable energy source? An energy source is renewable if it is constantly being supplied.

3. Solar Energy Hydroelectricity Wind Power Biomass Fuels Geothermal Energy Solar Energy Hydroelectricity Wind Power Biomass Fuels Geothermal Energy What are some examples? What are some examples?

4. Solar Energy Solar Energy The warmth from the sun is solar energy. The Sun constantly gives off energy in the form of heat and light. The warmth from the sun is solar energy. The Sun constantly gives off energy in the form of heat and light.

5. Capturing the Sun’s Energy Capturing the Sun’s Energy Solar Power Plants use giant mirror to focus the sun’s rays into a tank of water. The water heats up and turns into steam. That steam is used to create electricity. Solar Power Plants use giant mirror to focus the sun’s rays into a tank of water. The water heats up and turns into steam. That steam is used to create electricity.

6. Capturing the Sun’s Energy Capturing the Sun’s Energy Solar Cells are used to convert solar energy into electricity. The cells act like a battery. What are some items that use solar cells? Solar Cells are used to convert solar energy into electricity. The cells act like a battery. What are some items that use solar cells?

7. Active vs. Passive Active vs. Passive Passive Solar Heating uses the Sun’s energy for heat. This energy is then spread through a building without using fans or pumps. Passive Solar Heating happens when you leave a car in a sunny spot for a long time. Passive Solar Heating uses the Sun’s energy for heat. This energy is then spread through a building without using fans or pumps. Passive Solar Heating happens when you leave a car in a sunny spot for a long time.

8. Active vs. Passive Active Solar Heating systems capture the Sun’s energy and store it in water tanks. Fans are used to distribute the heat throughout the building. Active Solar Heating systems capture the Sun’s energy and store it in water tanks. Fans are used to distribute the heat throughout the building.

9. Hydroelectricity Hydroelectricity Hydroelectricity is electricity that is made from flowing water. In a hydroelectric power plant, flowing water spins a turbine to create electricity. Hydroelectricity is electricity that is made from flowing water. In a hydroelectric power plant, flowing water spins a turbine to create electricity.

10. Examples of Hydroelectricity Examples of Hydroelectricity Dams are used to create hydroelectricity. The Hoover Dam in Nevada Hydroelectric power is the widely used renewable resource. Dams are used to create hydroelectricity. The Hoover Dam in Nevada Hydroelectric power is the widely used renewable resource.

11. Downside of Hydroelectricity Downside of Hydroelectricity In the U.S.A., the best rivers already have dams. What are some other downsides to hydroelecticity? What effect does it have on the environment? In the U.S.A., the best rivers already have dams. What are some other downsides to hydroelecticity? What effect does it have on the environment?

12. Wind Power! Wind Power! Just like hydroelectricity, wind can be used to spin a turbine and create electricity. Just like hydroelectricity, wind can be used to spin a turbine and create electricity.

13. Wind Power! Just like hydroelectricity, wind can be used to spin a turbine and create electricity.

14. Biomass Fuels Biomass Fuels Wood was one of the first biomass fuels used. Biomass Fuels are fuels that are made from living things. Wood was one of the first biomass fuels used. Biomass Fuels are fuels that are made from living things.

15. Biomass Fuels Biomass Fuels Other examples of biomass fuels are leaves, food wastes, and manure. Biomass materials can be converted into other fuels. For example corn Other examples of biomass fuels are leaves, food wastes, and manure. Biomass materials can be converted into other fuels. For example corn

16. Geothermal Energy Geothermal Energy Geothermal Energy uses the heat from the Earth’s hot magma for energy. Geothermal Energy uses the heat from the Earth’s hot magma for energy.