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Science 5th grade
test 2/17/2015
| Question | Answer |
|---|---|
| Circuits in your home actually begin and end at | power plants |
| the outlets in your home provide _________ current | alternating |
| A switch controls the _________ of electricity | flow |
| special switches such as _______ (for temperature) and ________ (controls light brightness) can be used | thermostats dimmers |
| Circuit _______, _________ and _________ outlets protect you by limiting the flow of electricity | breakers, fuses and GFCI |
| ________ measure the amount of electrons you NEED (does not change) | Volts |
| __________ measure how fast you use the electrical energy (does not change) | Watts |
| __________ measure how many electrons flow by | amps |
| watts= amps x _____ | volts |
| kilowatt hours measure the ________ of electricity you use | amount |
| How does electricity get to your house after it is made in a power plant? | The electricity goes through power lines |
| What are some of the electrical safety devices in your home and how do they work? | GFCI outlets because if you are getting electrocuted, it stops the flow of electricity. Insulation on wires because it keeps you from getting shocked |
| Magnetism creates ________ | electricity |
| Electricity creates ________ | magnetism |
| Magnets have 2 ______; electricity has 2 _______ | poles charges |
| the same poles _______ | repel |
| opposite poles ________ | attract |
| The same charges _____ | repel |
| Opposite charges ________ | attract |
| ________ forces do not need to touch to repel or attract | Magnetic |
| ______ charges do not need to touch to repel or attract | Electricity |
| A ________ uses a __________ to produce _________ energy | generator magnet electrical |
| What are the 4 main parts to a generator | Magnet - turned by drive shaft Copper wire - magnet moves electron in the wire Drive shaft - turns magnet turbine - turns the drive shaft |
| This is how a generator works | 1 - The turbine is turned by something that moves (mechanical energy) 2- the turbine turns the drive shaft 3-the drive shaft turns the magnet 4-the magnet moves electrons in the copper wire 5-the electrons move out to other wires (electricity) |
| Steam, _____ water, and the _________ can be used to turn the turbine | moving wind |
| ______, coal, natural gas and ______ can be burnt to heat up water to make steam | oil biomass |
| Natural _____ and _____ are the most popular, but they pollute the air | gas coal |
| _______ panels can produce electricity without a generator (photovoltaic cells) | solar |
| Describe how the chemical energy in coal is turned into electrical energy | It goes through a hopper and into a furnace |
| Describe how the kinetic energy of a river is turned into electrical energy | water turns a wheel that is connected to a turbine which makes electricity |
Created by:
sdrago
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