# Physical Science chapter 4

 __ of an electric current through a wire occurs as an electron travels a short distance and then repels another electron. conduction __ rays are high energy rays which can cause skin cancer ultraviolet is a measurement of the rate of current flow amp light usually travels more rapidly through a __ than a solid or liquid gas when the temperature is high, the resistance to the flow of electricity would probably be __ high __ is associated with Mr. Roy G. Biv light __ wavelengths of light have a higher frequency shorter __ rays are heat rays, they have a frequency slightly lower than visible light infra-red an __ is uncharged, but it contains electrons and protons, which are charged particles atom ultrasonic waves occur at frequencies __ than our ears can hear higher two negative charges will __ each other repel __ effect involves a decrease in the frequency of sound or light as the source moves away from us. doppler sound usually travels more rapidly through a __ than a liquid and gas solid a __ circuit has only one path for the electric current to follow series the path through which an electrical current flows circuit a __ is a unit used to measure the potential difference between two points in a circuit volt __ electricity flows from one place to another in a circuit current the distance between successive disturbances of the same types (from one wave crest to another) wavelength __ from the sun travels fastest through space ( a vacuum) radiation the parts of a magnet where magnetic force (field) is the strongest (north and south) poles the number of disturbances of the same type (compressions, crests, troughs, ect..) that pass a point in a second frequency the part of a sound wave where the molecules are closer together compression a unit used to indicate the loudness of a sound decibels electricity travels through a wire more easily when the wire is __ cold an electromagnet can be made by wrapping a wire around a(n) __ core iron an electron has a __ charge negative a device which can be used to decrease voltage and increase current, or to increase voltage and decrease current transformer the unit used as a measure of the amount of current ampere a substance which does not permit the passage of electricity insulator __ electrical charges repel each other like an increase in __ causes an increase in the speed of a sound wave. temperature a form of energy which can be produced by an electric current moving along a thin filament of wire light when two different objects are rubbed together; __ electricity may result static a transparent device which refracts or bends light rays as they pass through it lens the __ coil is the coil of wire in a transformer that electricity from an outside source is flowing through. primary light is a type of __ radiation electromagnetic a __ wire connected to the round post of a plug allows electrical charges to move through a low resistance pathway into the ground (protecting us) ground accumulated electrical charges that are at rest (not moving) are __ electricity static traveling faster than the speed of sound supersonic a substance that electricity will flow through is a __ conductor light is bounced back or __ from the surface of mirror reflected __ electrical charges attract each other unlike a __ has a silver coated surface so that it reflects (or bounces back) light rays mirror visible __ occurs at the frequencies which stimulate receptors in our eyes allowing us to see light __s are determined by dividing the voltage by the resistance (ohms) amp AuthorAnonymous ID81994 Card SetPhysical Science chapter 4 Descriptionscience Updated2011-04-26T20:46:57Z Show Answers