the study of matter and how it changes
molecules are tightly packed, have a definite shape and volume, cannot be compressed, and only vibrate a little
molecules are loosely packed, have a definite volume but do not have a definite shape, cannot be compressed, and move somewhat
a substance that flows (includes liquids AND gases)
molecules are very far apart, have no definite shape or volume, can be compressed, and move very fast
substances with some characteristics of solids and some of liquids
the amount of space something takes up
the average amount of energy a substance has
changes the form of the substance but not its identity
solid to a liquid by adding heat
liquid to a solid by taking away heat
liquid to a gas by adding heat
vaporizing that takes place on just the surface of the liquid
vaporizing that takes place throughout the liquid
gas to a liquid by taking away heat (fog on a mirror, "sweat" on a cold can of pop)
solid to a gas or gas to a solid (no liquid phase in between)
a property that can be observed WITHOUT changing it into another substance
a property of a pure substance that describes its ability to CHANGE into different substances
chemical property that describes how easily something catches fire and burns
chemical property that describes how acidic or basic (alkali) a substance is
physical property that describes how easily something will dissolve in water
state of matter
physical property that describes whether something is a solid, liquid, or gas
physical property that describes the feel of something
chemical property that describes how easily a substance will react with another substance, ie. baking soda reacting with vinegar
substance that has a pH higher than 7 on the pH scale
substance that has a pH lower than 7 on the pH scale
substance that has a pH of 7
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