vocab - PHYSICAL SCIENCE VOCABULARY acceleration- The rate...

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PHYSICAL SCIENCE VOCABULARYacceleration-The rate of change invelocity (a change in direction or achange in speed).acid-A substance that produceshydrogen ions in solution; thesesolutions have a pH less than 7.alternating current (AC)- Electriccurrent that reverses its direction in aregular pattern; the 60-Hz AC in ourhomes changes direction 120 times eachsecond.acid rain- Rain with a pH less than 5.6;produced by substances in the airreactingwith rainwater.acoustics-The study of sound.actinide-Any of the 14 radioactiveelements having atomic numbers 90-103; used in nuclear power generationand nuclear weapons.active solar heating- Collecting the sun'senergy with solar panels, heatingwaterwith that energy, and storing theheatedwater to use the energy later.aerosol-Aliquid sprayed from apressurizedcontainer; for example, acanof insectspray.air resistance- Frictional force airexertson a moving object; acts oppositeindirection to the object's motion.alchemist-A medieval version of themodernchemist; a practitioner whoblendedprimitive chemistry with magic,seekingto turn ordinary metals intogold.alcohol-Type of compound formedwhen-OH groups replace one or morehydrogen atoms in a hydrocarbon.allotropes-Different structural forms ofthe same element; for example, somecarbon molecules form soft graphite,whereas others form hard diamonds.alloy-A mixture consisting of a metaland one or more elements.alpha particle- A particle of nuclearradiation emitted from a decayingatomic nucleus; has a charge of 2+, anatomic mass of 4, and is the largest,slowest, and least penetrating form ofradiation.amalgam-An alloy containing theelement mercury; an example is dentalfillings.ammeter-A galvanometer thatmeasures electrical current passingthrough in amperes; connected in aseries with the circuit.amorphous-Something that has nospecific shape; for example, a liquid orgas.ampere-The unit of measuring current,the rate of flow of electrons in a circuit.amplification-The process of increasingthe strength of an electric signal.amplitude-In a wave, the distance fromthe rest position of the medium to eitherthe crest or trough.amplitude modulated- (AM) waves -Radio waves whose amplitude is variedwith voice, music, video, or data fortransmission over long distances.angle ofincidence- In waves, the angleformed bythe incident wave and thenormal.angle of reflection- In waves, the angleformed by the reflected wave and thenormal (perpendicular).anhydrous-A chemical compound thatnormally has water molecules attachedtoits ions but from which water has beenremoved.antacid-An "anti-acid," or a chemicalthat changes an acid substance to aneutral substance.antifreeze-A solute added to a solventto lower the temperature at which thesolvent will freeze.

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Term
Winter
Professor
Mel Renney

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