Classifications of Energy Going from potential energy… to kinetic energy! (stored energy; the energy of position) (energy of motion)
Energy Transformations Energy can change forms… Chemical energy becomes mechanical energy when… We pedal a bike!
Energy Transformations Electrical energy becomes thermal and radiant energy when… We turn on a light bulb!
How do we begin with an energy source and end up with electricity? Energy Transformations
The Electromagnetic Effect
There is one energy source that can generate electricity WITHOUT using the electromagnetic effect; it uses a different effect entirely… Can anyone guess what that energy source is? Another Source?
The Photovoltaic Effect
Who can name the two different types of energy sources? Energy Sources Renewable Non-Renewable
Non-Renewable Energy Sources Formed in the Earth over hundreds of millions of years Must be extracted from the Earth, often involving mining or drilling By definition, they are limited. They will run out!
Examples of Non-Renewables Coal Natural Gas
Examples of Non-Renewables Petroleum Uranium
Fossil Fuels Fossil fuels are non-renewable energy sources
Non-Renewable Benefits Inexpensive Infrastructure in place Abundant Efficient fuel source ✔ ✔✔✔ ✔✔✔✔ ✔✔✔✔
Non-Renewable Costs Pollution and mining damage the environment Contributes to climate change Limited supply ✔ ✔✔ ✔✔✔ ✔✔
Renewable Energy Sources Come in many different forms Have been used by humans for thousands of years By definition, naturally replenish themselves…They will NEVER run out! Much cleaner than non-renewables
Examples of Renewables Solar Wind
Examples of Renewables Hydropower Geothermal Power
Renewable Costs Won’t always work Might damage environment Can’t use everywhere Inefficient ✔ ✔ ✔ ✔✔✔ ✔✔ ✔
Renewable Benefits Clean - no pollution Don’t contribute to climate change Small, modularQuiet ✔ ✔✔✔ ✔ ✔✔✔ ✔✔✔ ✔✔
Remember this info, you’ll need it for the exciting SRP presentation coming soon! The SRP Powering Our Future Classroom Outreach Presentation!