Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Transcript of MichaelH
What is Electricity?
Electricity is a type of energy that can build up in one place or flow from one place to another. When electricity gathers up in one place it is known as static electricity, electricity that moves from one place to another is called current electricity
Where does electricity come from?describe the circuit that electricity makes from the power plant to your home.
Electricity comes from Energy resources. Energy resources are divided into two groups renewable and nonrenewable. A nonrenewable resource is something that you can run out of. Fossil fuels which include coal , oil , and natural gas, are nonrenewable resources. Renewable resources are easy to replace. Renewable resources are wood , wind, sunshine , geothermal energy , biomass and water stored behind dams called reservoirs. The electricity is created then sent through a transformer which increases the voltage then the transformer sends it over high voltage transmission lines , which run all through the country . Once electricity nears it’s destination it goes through a substation that will return electricity to low voltage energy so that it can be sent over smaller power lines that run through homes , schools , and businesses.
How is electricity generated?
Coal is dug up and sent on trains and boats. The coal is burned to heat water to make steam. Inside the generator the steam spins s big fan called a turbine. The spinning turbine rotates a big magnet around a piece of wire and that motion creates a magnetic field that electrifies the wire. The electric current flows through the wire and is pushed out through high voltage transformers.
How does electricity travel through conductors?
Electricity travels by the steady flow of electrons. When electrons move from one place to another they carry electrical energy from place to place like marching ants carrying leaves. Instead of them carrying leaves , electrons carry small amounts of electric charge.
How do insulators effect how electricity travels?
Metals like copper have free electrons that are not squeezed together tightly to their parent atoms. In rubber , the electrons are more tightly bound. There are no free electrons , as a result electricity doesn't flow through rubber at all.
600 BCE: a Greek philosopher discovered static electricity
1600 CE: William Gilbert was the first person to use the word electricity
1733: Charles du Fay found there were to different kinds of electric charges.
1752: Benjamin Franklin named positive and negative
1780: Luigi Galvani did experiments on a dead frog leading him to believe electricity is created inside animals’ bodies.
1785: Charles Coulumb explored the electric fields.
1821: Michal Faraday developed the first electric motor
1831: Michal Faraday created the electric generator
1881: the first power plat was opened in Godalming, England.
1882: Thomas Edison opened the first power plant in the USA.
1. What kinds of energy and natural resources can be used to create electricity?
Coal, oil, natural gases, wind, water, and solar energy.
2. How can water be used to create electricity?
The power of moving water turns gears which turn mechanical gears that generate electricity
3. What is nuclear energy and how is it produced?
The energy that is generated from splitting atoms of radioactive materials. Nuclear energy splits uranium atoms to produce heat, which turns water to steam which is used to turn a turbine.
4. What is natural gas and how can it be used to create energy?
A fossil fuel found deep under the earth. Burned to produce heat.
5. Where do coal, oil, and fossil fuels come from and how are they used to make energy?
They come from dead plant and animals deep in the ground. Burned to produce heat.
6. What kinds of problems do some of these energy sources create for the environment?
Coal polluts the air and if oil is split then lots of animals will be in danger.
Electricity is a great invention , but can be dangerous. Here is some ways you can get hurt. Electronics and water don't mix. If you are in a body of water with an electronic you will get shocked and die. Never touch broken wires or cords.
Trees and power lines can be dangerous. If you climb them near power lines electricity could be traveling through the branches and shock you.
All homes should have fire extinguisher , fire and smoke alarms , and surge protectors.
Keep cords out of paths that people walk in. Keep cords and wires out of pets and babies reach.