16 terms

Physics - Physical Change (Unit 4)

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physical change
for this type of change, a substance may look different, but the chemical formula does not change
chemical change
for this type of change, new substances are created, and the chemical formulas are different
matter
has mass and takes up space
volume
the amount of space matter takes up
liquid and gas
two states of matter that are fluids
gas
molecules move fastest in this state of matter
solid
molecules move slowest in this state of matter
thermometer
instrument used to measure temperature
melting
changing from a solid to a liquid
freezing
changing from a liquid to a solid
moving air, warmer temperatures, and more surface area
the 3 things that will make water evaporate more quickly
vaporizing
changing from a liquid to a gas
condensing
changing from a gas to a liquid
0 degrees Celsius
freezing and melting point of water
20 degrees Celsius
room temperature
100 degrees Celsius
boiling point of water