Science Exam 2014
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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| conductor | material in which electrical charges can move freely from place to place
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| Ohm's Law | relationship among resistance, current, and potential difference.
V/R=I
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| Circuit | complete, or closed path
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| current | how much electric charge flows past a point in a circuit during a given time.
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| resistance | property of materials that indicates how much energy changes.
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| cold front | when a cold air mass invades a warm air mass.
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| warm front | when a warm air mass meets a cold air mass.
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| relative humidity | a measure of the amount of water vapor in the air.
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| electric motor | uses an electromagnet to change electric energy into mechanical energy
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| electric generator | changes kinetic energy of rotation into electric energy.
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| electromagnetic spectrum | entire range of electromagnetic waves, from extremely low to extremely high frequencies
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| constructive interference | the interference of two or more waves of equal frequency and phase
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| destructive interference | the interference of two waves of equal frequency and opposite phase
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| frequency | the rate at which something occurs or is repeated over a particular period of time or given sample
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| magnetic domains | a region within a magnetic material
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| alpha particle | a helium nucleus emitted by some radioactive substances, originally regarded as a ray
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| beta particle | a fast moving electron emitted by radioactive decay of substances.
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| electromagnet | a soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
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| insulator | a substance that does not allow the passage of heat or sound or conduct electricity.
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| barometer | an instrument measuring atmospheric pressure, used especially in forecasting the weather and determining altitude
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| neutron | a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen
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| proton | a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign
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| electron | a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids
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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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