the movement of waves through a medium(vibrations)
the measurement of a high sound or low sound
The number of vibrations per second
the distance between two compressions
ROY G. BIV
when light bends
when light bounces off of an object
sound navigation and ranging, humans use echoloation with the use of sonar, a sound signal is sent out and part of it will be reflected back if it strikes an object or "target"
light is a source of energy
if no rays pass though an object
if rays pass easily throgh an object, clear or see through,
if some rays pass through an object
the build up of electric charge on the surface of objects. - Benjamin Franklin learned that lightning was a form of static electricity
electric currents are able to flow
electric currents are not able to flow
sound is a copression wave
a rapid motion back and forth, to move or cause to move back and forth or from side to side very quickly
anything involving electric charges but usally refers to static, direct current, and alternating current electricity.
a circuit with a break in it (stops electricity from moving
a circuit with no breaks or interuptions
a curcuit where different parts of the circuit are on seperate paths
a basic circuit consisting of three elements: a conductor, a load, and an energy source and has only one pathway
a magnet produced by an electric current, usally a type of iron wrapped in a conductor
magnetism and electricty are very closely related; a current running through a wire and a magnet produce a magnetic field
the abilityto do work
two objects rubbing against each other to create heat(ex.rubbing hands together
energy at rest. Potential energy is also stored energy.
energy in motion
machines used to make work easier
a combination of two or more simple machines(Ex. wheelbarrow, scissors, bicycle)
a simple machine with fulcrums (pivot points) are usually levers. a bar used to pry or move something. (Ex. seesaw, crowbar, shovel, nutcracker)
a nail shaped or rod-shaped piece of metal with a winding ridge around its length used for fastening and holding pieces together.
(Ex. jar lid, corkscrew)
a simple machine with ropes or chains used to raise something.(Ex. hoist a flag, raise window blinds.
wheel and axle
a simple machine consisting, in its typical form, of a cylindrical drum to which a wheel concentric with the drum is firmly fastened: ropes are so applied that as one unwinds from the wheel, another rope is wound on to the drum.
a ramp-like object that makes moving heavy things easier.