Physical Science Chemistry - 2

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Terms in this set (...)

CHEMICAL REACTION
the combining of two or more substances where bonds have been made and a new substance formed. This new substance cannot be separated back into its original parts
LAW OF CONSERVATION OF MATTER
matter cannot be created nor destroyed, it just changes shape
PHYSICAL CHANGE
when an object or substance changes what it looks like, it's shape, color but not its chemical makeup
CHEMICAL CHANGE
when an object or substance changes its chemical makeup
ACID
a substance that has the pH between 1 and 6 and is the opposite of a base
BASE
a substance with the pH of 8 to 14 and is the opposite of an acid
NEUTRAL
a substance with pH 7 that is not acid nor a base. Water is a neutral substance
pH SCALE
a scale that shows the strength or weakness of an acid, neutral or base
INDICATOR
a substance that indicates or shows the presence of and acid or base

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