martes, 28 de septiembre de 2010

vocabulary 5

mass:the amount of matter in an object.










volume:the amount of space an objects takes up.

weight:a measure of the force of gravity betwwen Earth and  an object. 



density:a measure of how tighly packed matter is ;the amount of mass contained in a given volume.

bouyancy:the upward push on an object by the liquid the object is placed in.



conduct: allow heat or electricity to flow through readily.
insulate:not allow heat or electricity to flow through readily


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