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Phases
Test Tuesday May 25th
19
Physics
9th Grade
05/21/2010

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Term
Physical Properties
Definition
can be observed without changing the identity of the substance
Term
Phase
Definition
an important physical property of matter
Term
four phases
Definition
solid, liquid, gas, plasma
Term
solids
Definition
definite shape and volume, contains particles that are tightly packed
Term
liquids
Definition
have particles that are close together but free to move around, no definite shape, definite volume
Term
gas
Definition
no definite shape or volume, can be compressed into a very small area or can keep expanding forever
Term
plasma
Definition
very high in energy, ex. the sun
Term
amorphous solid
Definition
solid that loses its shape under certain conditions, wax playdough clay icecream
Term
Boyle's Law
Definition
when the pressure doubles the volume of the gas is cut in half
Term
Charles Law
Definition
as the temperature increases so does the volume of the gas
Term
melting
Definition
solid -> liquid
Term
freezing
Definition
liquid -> solid
Term
vaporization (boiling point) or evaporation
Definition
liquid -> gas
Term
condensation
Definition
gas -> liquid
Term
sublimation
Definition
solid -> gas, iodine and dry ice
Term
physical changes that absorb heat
Definition
melting, vaporization, sublimation
Term
physical changes that give off heat
Definition
freezing and condensation
Term
It takes _ to cause a phase change
Definition
energy
Term
A _ change produces a new and different substance
Definition
chemical
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