Energy Sources: Part 2Energy Sources: Part 2Renewable Sources of EnergyRenewable Sources of Energy

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.

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?

Solar EnergySolar 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.

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.

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?

Active vs. PassiveActive 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.

Active vs. PassiveActive 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.

HydroelectricityHydroelectricity

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.

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.

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?

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.

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.

Biomass FuelsBiomass 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.

Biomass FuelsBiomass 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

Geothermal EnergyGeothermal 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.