PBL #3

Solar PanelsLED lights

Hybrid Cars

Solar panels

• How was it invented?A French physicist invented it as he was experimenting, he saw a voltage develop when sunlight fell on the electrode

• How does it work?Uses solar energy to generate electricity

Solar Panels

• How does it help the environment?Rather than causing air pollution by burning coal, it uses renewable energy

LED lights• How is it used?

Used for flashlights, signs, Christmas lights, lamps

• How does it help save energy?it uses the same lower energy while brightening up the room

Compare & contrast flashlight to LED light:

What is the same? What is different?

Hybrid Cars

• How it is used?People use it to save money and to save the environment

How it was invented?It was created as a response to global warming

and to improve fuel efficiencyHow it helps the air around us?It uses less fuel and some electric energy to

cause less air pollution