Energy & Electricity Generation How do we produce electricity using different energies?
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Transcript of Energy & Electricity Generation How do we produce electricity using different energies?
Energy
• What do you think of when you hear the word “energy”?
Energy
• Definition- the ability to do work over a period of time
• Cannot be created or destroyed– What does that mean?
• Can be converted from one form to another
Conservation of Energy
• How can we conserve energy?
• Where can we conserve energy?
• Is it really that important?
Forms of Energy
• Mechanical Energy- Energy generated by machines or mechanisms
• Chemical Energy- Energy generated by chemicals or a chemical reaction
• Nuclear Energy- Energy that is stored in the nucleus of an atom
• Gravitational Energy- Energy of position or place (ie. Rock on top of a hill, hydropower)
Forms of Energy
• Electrical Energy- Movement of electrical charges
• Radiant Energy- Electromagnetic energy that travels in transverse waves (ie. Solar energy, visible light)
• Thermal Energy- Internal energy in substances (ie. Geothermal, heat)
• Motion Energy- Movement of objects from one place to another
• Sound- Produced when a force causes an object or substance to vibrate
Electricity
• Electricity is the flow of electrical power or charge.
• It is a secondary energy source which means that we get it from the conversion of other sources of energy, like coal, natural gas, oil, nuclear power and other natural sources, which are called primary sources.
• The energy sources we use to make electricity can be renewable or non-renewable, but electricity itself is neither renewable or non-renewable.
http://www.eia.doe.gov/kids/energyfacts/sources/electricity.html
Electricity ExerciseWebsite
• Circuit and Conductors Website
• Circuit- Closed/Open
• Cells
• Conductors
• Insulators
Voltage, Current, and Restistance
• Current- rate of flow of electrons
• Voltage- force that causes the current to flow
• Resistance- refers to properties that stop the flow of electrons
Anatomy of a Wire
Conductor (Copper wire)
Insulator (Plastic coating)
The Atom Of Technology
Protons (+)
Neutrons (neutral)
Electrons (-)
Coal, Oil, Natural Gas, Trash
• How Electric is Created by Fossil Fuels
• How Electricity is Transmitted
• Electricity is generated by the same basic method, turning a generator.
Solar Cars
• We will be making a solar car for our next project.
• This project is a problem solving engineering project.
• You will be given a series of parts to compile together into a working model of a solar car.