1. Generating Electricity: Energy Conversions & Societal Issues
Climate Change & You

2. The Sun begins the process for all forms of electricity through Photosynthesis.

3. Fossil Fuels start with the Sun: Coal, Oil, Natural Gas
Fossil Fuels start with the Sun: Coal, Oil, Natural Gas. Decaying plants & Animals buried in the Earth decompose to form “fossil” fuel. Takes 500 million years. NONRENEWABLE because they can’t be replaced in a human lifetime. Pros: Inexpensive, mature technology, Creates Wealth for some Cons: Polluting Creates Greenhouse gases/Climate Change, Environmentally damaging

4. Generating Electricity in Society: Burn Fossil Fuels (CE) to create Steam (TE) to move a magnet(ME) inside a coil of wires to create electrical voltage (EM); then send that voltage/current to our homes

5. Electricity Generation: Burning Fossil Fuels
Move a magnet inside a coil of wires to cause electricity in the wire

6. Alternative Energy approaches to generating electricity: “Green Energy” Solar, Wind, Hydroelectric, Biomass RENEWABLE sources of electricity because we don’t use them up to generate electricity. Pros: Non Polluting, Environmentally Friendly Cons: Expensive

7. Hydroelectricity starts with the Sun

8. Hydroelectric Energy Conversions

10. Wind energy starts with the sun

12. And of Course Solar Power is from the Sun
Photovoltaic panels directly convert sun’s light (EM) to Electricity in a wire (EM)
Pros: Non Polluting, Environmentally Friendly Cons: Expensive
Must convert DC voltage
to AC for home use