Electricity - Ch. 20 Prentice Hall Science Explorer
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| away from | The electric charge arrow always points ___ positive
charges.
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| charge | Electric ____ is another names for electrons.
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| chemical | This is the energy stored in chemical bonds holding
chemical compounds together.
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| electric circuit | a complete, unbroken path through which electric charges can flow
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| conduction | a method of charging an object by allowing electrons to flow by direct contact from one object to another object
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| current | Electric _____ is the continuous flow of electric charges
through material that are conductors like metals.
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| distance | The strength of the electric field is related to the _____
from the charged object.
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| dry cell | A ____ is an electrochemical cell in which the electrolyte
is a paste.
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| electric field | is a region around a charged object where the object's electric force is exerted on other charged objects
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| electric force | In electricity, the _____ is the attraction and repulsion
between electric charges.
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| electrochemical | Chemical reactions occur between the electrolytes and
electrodes in ____ cell. These reactions cause one electrode to become negatively charged and the other electrode positively charged
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| electrolyte | A substance that conducts electric current is called ___.
Volta used silver and zinc as electrodes and salt water as
his _____.
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| electrons | When a negative charged object and a positively charged object are brought together, ___ transfer until bothobjects have the same charge.
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| energy | Electric charges need __ to flow.
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| exists alone | There is one important difference between electric charges and magnetic poles. Magnetic poles cannot ____ but electric charges can.
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| friction | Charging by ____ is the transfer of electrons from one
uncharged object to another by rubbing.
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| induction | Charging by ____ is the movement of electrons from one part of an object to another part that is caused by the electric field of a second object and the objects are not touching.
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| insulator | Material that is ____ does not transfer electricity easily or well.
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| Parallel | A circuit in which there are two (pair) or more paths for
the current to flow. Adding lights does not change the
brightness.
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| Power | The rate at which energy is transformed from one form to
another is known as ______. What? Exactly.
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| resistance | current depends on the ___ of the material it flows through and how difficult it is to flow through. The more difficult the ____, the the more difficult for the current to move through
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| Series | A circuit in which there is a Single path for the electric current to flow. Adding bulbs make them dimmer.
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| static discharge | The loss of static electricity as electrical charges transfer from one object to another is called _____.
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| static electricity | In ___ the charges build up on an object but they do not flow continuously.
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| towards | The electric charge arrow always points ____ the negative charge.
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| voltage | ____ causes a current in an electric circuit. You can think of this word as the amount of force pushing an electric current.
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| voltage source | A ____ is a device that creates potential difference in an electric circuit. Batteries and generators are examples.
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| work | The movement of electrons from one atom to another is a current because ___ is a force moving an object some distance.
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| Conservation of Charge | the law that states that charges are neither created nor destroyed but only transferred from one material to another.
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| conductor | a material through which charges can easily flow
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| electrode | The rod in a battery. One is often zinc and the other copper. The positive charges collect on one and the negative on the other.
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| terminal | a convenient attachment point used to connect a cell or a battery to a circuit
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| battery | a combination of two or more electrochemical cells in a series
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| wet cell | an electrochemical cell in which the electrolyte is a liquid
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| short circuit | a connection that allows current to take an unintended path
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| grounded | allowing charges to flow directly from the circuit into Earth in event of a short circuit
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| third prong | the round prong of a plug that connects any metal pieces in an appliance to the safety grounding wire of a building
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| fuse | a safety device with a thin metal strip that will melt if too much current passe through a circuit. A metalloid on the periodic table.
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| circuit breaker | a reusable safety switch that breaks the circuit when the current becomes too high
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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.
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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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