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Science Voc Unit 3
Vocabulary
Question | Answer |
---|---|
having a pH value of less than 7 | acid |
the smallest unit of an element | atom |
having a pH value of more than 7 | base |
a change in matter that produces new substances | chemical change |
a characteristic that is observed when a substance interacts with another substance | chemical property |
a substance made of two or more elements chemically combined in a set ratio | compound |
mass per unit volume | density |
a subatomic particle with a negative electric charge found outside of an atoms nucleus | electron |
one of a class of substances that cannot be separated into simpler substances by chemical means | element |
a state of matter with no definite shape or volume | gas |
a compound, as litmus, that changes color when in contact with an acid or base | indicator |
a state of matter that has a definite volume but no definite shape | liquid |
a measure of how much matter is in an object | mass |