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April Saunders

on 28 January 2013

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Transcript of Electricity

ELECTRICITY What is Electricity? Electricity powers our world, and our bodies. Types of Electricity Static Electricity The Human
Connection! Electricity is an invisible form of energy that can be transformed into other types of energy such as light and heat.

Electricity is the movement of electrons from one atom to another. Electrons are negatively charged (-), and always flow towards a positively charged (+) atom. Electricity flows from negative to positive. Current Electricity The flow of electrons through a conductor.

Current: a measure of the amount of energy transferred over time. DC- direct current

AC- alternating current The single and sudden transfer of electrons from one surface to another. Caused by a build up of electrons on one surface until they are able to escape to a surface with an opposite charge. Conductors and Insulators Conductors Conductors are materials that allow electrons to easily flow through them. A material that can become charged with static electricity is called an insulator. If electrons are added they stay in place and the insulator is negatively charged. Insulators Circuits! Circuits are pathways for electrical current to flow through.

Power source: provides a steady supply of electrons (Battery).

Conductor: provide a means for electrons to move easily through the electric circuit (Metal wire).

Load(receiver): a device that uses electricity (lightbulb). Components of an Electrical Circuit some circuits contain a switch so that the circuit can be turned on or off. Switch Circuits Types of Circuits! Series Circuit Parallel Circuit Ammeter Measures current ( flow of electrons) in amps (A). Voltmeter Measures the electric potential difference
between two points in an electric circuit in volts (V). Quantifying Electricity! The brain uses electrical signals to carry out the various functions of the human body. Electricity (the movement of electrons) carries messages from one point in the body to another. Station #1 Station #2 Station #3 Station #4 Station #5 Static Electricity Conductors and Insulators Building Circuits Measuring Current and Voltage The Lemon Battery Try these five stations and discover more about how electricity works! Thank you all for your participation! Just one more thing before you go... What is one thing that you can do to conserve the amount of electricity that you use?
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