Science Electricity Study Guide

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Science Electrical Matching

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The smallest unit of matter

everything is made from

Every atom is comprised of a __________ and ____________

_________ is positive

the center

made up of protons and neutrons

the outside

are negative

Electricity/Where does Electricity come from?

What is an object or material that allows the flow of an electrical current in one direction?

Metals are

What is a material or object where electricity doesn't flow freely?

What are examples of good insulators?

why are electrical wires in the house encased in plastic?

Who discovered that electric currents create magnetic fields in 1820?

What is electromagnetic induction?

Who discovered electromagnetic induction and when

What led to the created of all modern motors and generators?

what is an example of electromagnetic induction?

flow of electrical charge or flowing electrical energy

moves a conductor in a magnetic field to create an electrical charge via electromagnetic induction

What is the input and output of an electric generator?

What is the input and output of an electric motor?

example is an emergency generator

example is a blender

what are the potential sources of energy for a generator?

energy due to motion or position

a device used to convert mechanical energy into electricity

device that turns due to pressure from an outside source

example: wind turbines and water wheels

turns electricity into mechanical energy

transfers electricity from a generator to a device

what are the renewable resources?

Steps to calculating percentages on flow chart

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Atoms

current

turbine

a conductor

steam, ocean waves, water, pressure

nucleus and electrons

Michael Faraday in 1831

turbine

an insulator

electric generator

good conductors

input = electric energy output = mechanical energy

Nucleus

Atoms

electrons

1. solar 2. hydro 3. wind 4. geothermal 5. biomas

electromagnetic induction

motor

mechanical energy

When electrons move in one direction we get electric current or electricity

electric generator

plastic is a good insulator

Nucleus

1. add all energy sources up...94.02 2. add up renewable sources...8.832 3. Do renewable divided by all 8.832/94.02 = .093 Move the decimal to the right twice = 9.3%

moving a magnet in a tube wrapped in copper wires creates an electrical current

Electricity is caused by a changing magnetic field.

transmission

electrons

glass, paper, and plastic

Hans Christian Oerstad

Nucleus

electric motor

Input= mechanical energy output= electric energy

generator