science - chp 21
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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| static electricity | the net build up of electric charges on an object
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| electric field | an area surrounding an electron that exerts a force on anything nearby with an electric charge
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| conductor | a material that allows electrons to move easily through it
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| insulator | a material that does not allow heat or electricity to move through it easily
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| electroscope | a device containing two suspended metal leaves in a jar tht move apart when charged
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| potential difference | the difference in electric potential energy between two different points
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| circuit | a closed path through which electrons flow
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| current | the flow of electrons through a wire or any conductor
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| dry cell | a power source that acts as an electron pump and generates electric current by a chemical reaction
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| wet cell | a power source that generates electric current by a chemical reaction; liquid electrode
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| resistance | the opposition to the flow of electrons through a conductor; measured in ohms
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| Ohm's Law | states that potential difference = current X resistance
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| series circuit | An electrical circuit where the current has only one path
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| parallel circuit | an electrical circuit where the current flows through more than one path
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| electrical power | the rate at which electrical energy is converted to another form of energy
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| kilowatt-hour | the unit of electrical energy; 1 kilowatt hour = 1000 watts
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
Christina Watson
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