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### 82 Cards in this Set

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 hypothesis are tested by planing? experaments what you know from seeing hearing and or feeling? observation a scientific guess prediction when a hypothesis is found to be correct it becomes a? theroy what is the dependent varibal? independent varibal? control? constant? the factor adjusted by the experament independent varibal is on what axis? x axis what axis is the dependent varibal on? y axis waht is the basic metric unit of length? meter what is the basic metric unit of mas? gram define speed rate of change in potion define velocity rate of motion in direction discribes both speed and direction define acceleration rate of change in volicty how are speed and volicty different? speed is limit while volicty has direction reat of change in potion is? speed speed plus direction is called? volicty the rate of change of volicty is called? acceleration the rate of motion that doesnt change is? constant speed the unit for speed is? m/s the unit for acceleration is? m/s2 the unit used for volicty is? m/s the unit used for time is? sec or s the unit used for acceleration due to gravity is? mass divided by acceleration what is acceleration due to gravity? give example ball falling from sky, incress of volicty due to the force of object what does deceleration mean? decreases of speed negitive rate of charge whitch of Newtons laws of motion states that an object at rest will stay at rest or an object in motion will stay in motion until acted apon by outside force? first law whitch of Newtons laws of motion is illustrated by the forward motion of a passenger when a car suddenly stops moving? what is the term we learned for this? Newtons first law,,,inercia any pull or push is called? force teh product of mass times acceleration equals? force what term is used to describe the tendency of an object to keep moving? inercia a force that opposes motion between two surfaces that are touching each other is? friction the downword force excrted by earth is? gravity on the earth a feather will fall more slowly than a brick because of? air restance define weight gravitational force between earth adn any body at earths surface which of Newtons laws explaines that as the mass increases the amount of force needed to move the objec aslso increase? Newtons 2nd law the frictional force air excerts on a moving object is called? air restance using the same force which mass would have the greater acceleration- larger mass or smaller? smaller mass the path of a projectile object is? curved the two conponents of a curved motion are? horazontal the motion of an object parrallel to the surface of earth is? horazontal the force directed toward the center of a circle or curve is called? centriptial force state Newtons 3rd law of motion when one object excerts a force on a 2nd object the second object excerts a force on the first that is equal in size and opposite in direction state the law of conservation of motion the total amount of momentum of a group of objects does not change unless out side force act on the objects define work the transfer of energy through motion define kinetic energy energy in the form of motion define potential energy stored energy amount of potential energy a sample of matter has a perals on its potion or conduction a wave is... it transfers a rythem disturbance that carries energy through matter or space a wave is... its transfers a rythem disturbance that carries energy through matter or space...energy in a transvers wave the medium move? at right angles to the dircetion the wave travles frequency is....in what unit is it usly exressed? number of wave crest that pass one place.. herts as the frequency increases the wave length? decresses matter vibrates in a compressional wave in a direction that the wave length is going define compression and frequency the deasearea in a compressonal wave, the less dstance are in a compresice wave a pitch is? highness or lowness of a sound the higher the frequency the ____ the pitch... the lower the frequency the ______ the pitch? higher,,, lower the intensity of a sound wave depends on? amount of energy in each wave loudness is? human perseption of sound intensity define the doppler effect obdervatied when the sourface of sounf is moving relation to observer dfine the electromagneneitc spectrum. name the compontenets of spectrum group of transire waves produced by motion of electitry charged particals, specturmaranges from low frequency/energy raido waves to high frequnecy/energy raido waves use your mnemonic device it is only visible portion of the electromagnetic specturn light differentiate between opaque, transparent, and translucent materials opaque obsorvs or reflects all light transparent allows light to pass through clean translucent allows light to pass throught not that clear though what are the primary colors red blue and green what are the primary colors of pigment? yellow, magenta, and cyan the electromagnetic radiation haveing wavelengths just longer than visibal light is? infared raidation the electromagnetic radiation having the shourtest wavelength is? raido waves what is the trick you can use to remember the correct order of the visible colors? ROYGBIV Red Orange Yellow Green Blue Indigo Viloite which color has the longer wavelength? red which color has the shourtast wavelenght? violet radiation with wavelengths just a little shourter than visible light is? ultraviloite radiation a mirror that is curved like the inside of a spoon is? concave what is reflection? when a wave strikes an object and bounches off what is refraction? bending of waves caused by change in speed a mirror that is curved like the outside of a spoon? convex mirror what does inverted man? upright? upside down...right side up what is a real image? a virtual image? rays of light meet at images,,, images in which no light rays pass what is an insulator? conductor? matirial that doesnt allow electrons to move through easy what does inverted man? upright? upside down...right side up what is an insulator? conductor? matirial that doesnt allow electrons to pass through easy... material that allows electrons to move throght easily what are the three parts of an atom electronsm protrons, newtron what is staic electricty? accumlation of electric charge on an object what rule do electrically charged atoms obey? oppsite change to attract and like charges repal what causes lighting? a vary large discharge of static electricty what is a lighting rod? pointed metal rod that extends above the higest point of structer with a cable that connects the rod to the grund