energy
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Lesson 1:An object with extra electrons is.. | negative
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| An object with too few electrons is.. | positive
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| objects with like charges | repel
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| objects with unlike charges | attract
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| what is step one in a flashlight circuit | electrons leave the negative end of the battery
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| what is step two in a flashlight circuit | electrons move through the wire (conductor)
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| what is step three in a flashlight circuit | electrons enter the lightbulb and move through a tiny wire inside the bulb. The wire glows.
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| what is step four in a flashlight circuit | electrons leave the bulb and are pulled through the wire
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| what is the final step in a flashlight circuit | electrons move into the positive end of the battery
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| Lesson 2 What special switch is used to break a circuit in older homes | fuse
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| what place in the home contains the circuit breakers | circuit box
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| what part of a circuit opens or closes the circuit | the switch
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| Name a special switch that uses a built-in thermometer to control temperature | thermostat
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| what special switch is used to change the brightness of light | dimmer switch
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| what unit is used to measure the amount of electrica energy | kilowatt hour
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| what are the three basic parts of a generator | drive shaft, a strong magnet, a coil of wire
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| What are the two opposite magnetic poles | north and south
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| when do the two poles attract each other | opposite poles attract
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| when do the two magnetic poles repel each other | when the poles are alike
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| a generator is used to change ___________ energy into ___________ energy | mechanical into electrical
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| what kind of magnet is used in generators | electromagnet
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| Name one way a generator can produce electricity | by turning a magnet inside a coil of wire
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| Name a second way a generator can produce electricity | by moving a coil of wire near a magnet
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| what must be provided to an electrical generator before the drive shaft and the magnet of the generator can turn | A source of mechanical energy is needed to turn the drive shaft and the magnet of the generator
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| Name eight energy sources that supply the power for generators | coal, oil, nuclear, hydroelectric (water), geothermal, wind, tidal, wave energy
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| when electricity flows through a wire the wire becomes.. | magnetic
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| giant sparks of electic charges are called | lightning
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| An electic generator uses a.... | magnet
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| Metal is an example of a good electrical.. | conductor
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| 5 kilowatts equals | 5,000 watts
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| electric bills are based on how many _________ are used | kilo-watt hours
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| plastic is an example of a good electrical___ | insulator
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| how can two neutral objects become charged | by rubbing
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| what unit measures how strongly the electrons in a wire are pushed | volt
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| a generator is run by a.... | drive shaft
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| which special switch does not protect | dimmer switch
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| a battery in a flashlight changes _______ energy to _____________ energy | chemical to electrical
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| 7,000 watts equals ___________ kilowatts | 7 kw
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| the part of an atom that can be rubbed off is the... | electron
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| the flow of electricity in a circuit is controlled by a | switch
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| mechanical energy is changed into electrical energy by a | generator
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| electricity can make | magnetism
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| protons attract | electrons
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| magnetic forces can attract without | touching
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| what safety device is built into a small applicance such as a hair dryer | a GFCI plug
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| the electric charge of protons is | positive
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| 7,000 watts equals ___________ kilowatts | 7 kw
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| the part of an atom that can be rubbed off is the... | electron
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| the flow of electricity in a circuit is controlled by a | switch
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| mechanical energy is changed into electrical energy by a | generator
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| electricity can make | magnetism
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| protons attract | electrons
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| magnetic forces can attract without | touching
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| what safety device is built into a small applicance such as a hair dryer | a GFCI plug
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| the electric charge of protons is | positive
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Created by:
ddolan
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