Renewable energy Where does electricity come from First

Renewable energy

Where does electricity come from? • First of all, what is electricity?

Where does electricity come from? • First of all, what is electricity? “a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current. ” -Oxford Pocket Dictionary electricity is the energy that comes from moving or accumulating electrons • What are sources of electricity?

Where does electricity come from?

What is “green” and renewable energy? • Renewable energy –Energy that comes from a source that will not run out over time…What are some examples? • Green energy – Energy that doesn’t contaminate the environment (i. e. greenhouse gasses, CO 2, N 2 O )

Why do we want to use green and renewable energy?

Why do we want to use green and renewable energy? • Eventually we will run out of fossil fuels like coal and oil (need renewable sources ) • Fossil fuels release greenhouse gasses when we use them to make energy, these contribute to global warming (need green energy sources)

Solar energy • How does it work?

First, what is light?

Solar cells absorb light from the sun Absorption data from solar cells made from Cadmium Selenide in Mr. Edley’s lab.

How does a solar cell use light?

Todays challenge • We will play “Renew-a-Bean” • Get into groups of 4. – Begin reading instructions to Renew-A-Bean

Round 2 • Let’s think of a way we could make the energy supply last longer

Round 2 • Conservation of energy (use less per decade) • Use more renewable energy • Play Renew-a-bean again with your group’s idea to make the energy last longer