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Science Terms Final Exams
Final Exams Science Terms
31
Science
6th Grade
05/15/2012

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Term
distance
Definition
the length between two places
Term
postition
Definition
the location of an object compared with things around it
Term
motion
Definition
a change in an objects position compared with things around it
Term
speed
Definition
how fast an objects position changes with time at any given moment
Term
velocity
Definition
a description of a moving objects speed and direction
Term
acceleration
Definition
a change in the velocity over time
Term
force
Definition
a push or pull exerted by one object on another, possibly causing a change in motion
Term
friction
Definition
a force that opposes the motion of an object in contact with a surface
Term
Newtons first law of motion
Definition
an object at rest tends to stay at rest and an object moving in a straight line at a constant speed tends to keep moving that way
Term
Newtons second law of motion
Definition
an objects acceleration depends on the obkects mass and the ammount of net force applied to it
Term
momentum
Definition
the mass of an object multiplied by its velocity
Term
Newtons law of universal gravitation
Definition
the planets, the stars, and the sun all exert gravitational forces
Term
frequency
Definition
a measure of how many wave crests or troughs pass a given point in one unit of time
Term
compressional wave
Definition
a wave that moves matter back and forth as it travels through a medium
Term
compression
Definition
an area where particles in a medium are pushed together by a wave's energy
Term
alternating current
Definition
the electrical charge moves back and forth at regular intervals
Term
doppler effect
Definition
the change in a sounds pitch if its source or recipient is in motion
Term
lens
Definition
a piece of transparent material with atleast one curved surface
Term
law of reflection
Definition
the angle between an incoming light ray and a surface is equal to the angle between the reflected light ray and the same surface
Term
concave
Definition
a surface that curves inward
Term
convex
Definition
a surface that curves outward
Term
diffracting grating
Definition
glass or polished metal with many thin, parallel slits that refract light when tit passes through
Term
electromagnetic specrtum
Definition
the full range of wavelengths, arranged from long waves with the lowest ammount of energy to short waves with the highest ammount of energy
Term
heat
Definition
the flow of thermal energy from warmer to cooler objects
Term
amplitude
Definition
the height of a wave from its crest or trough to its midpoint
Term
conduction
Definition
the movement of energy such as heat or electricity through direct contact
Term
convection
Definition
the transfer of energy by the flow of a liquid or a gas
Term
electricity
Definition
a flow of electrons, particles having negative electrical charges
Term
kinetic energy
Definition
the energy of a moving object has because of motion
Term
current electricity
Definition
the flow of an electric charge through a circuit
Term
generator
Definition
a device that converts mechanical energy into electrical energy
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