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Science Chapter 6 Quiz
Vocabulary
19
Science
8th Grade
11/22/2010

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Term
Matter
Definition
Anything that has mass and takes up space
Term
Chemistry
Definition
The study of matter and how matter changes
Term
Physical property
Definition
A characteristic of a substance that can be observed without changing the substance into another substance
Term
Chemical property
Definition
A characteristic of a substance that describes its ability to change into other substances
Term
Physical change
Definition
A change that alters the form or appearance of a substance
Term
Chemical change
Definition
A change in matter that produces one or more new substances
Term
Reactants
Definition
The substances that undergo change in a chemical reaction
Term
Products
Definition
The new substances formed by the reaction
Term
Precipitate
Definition
A solid that forms from solution during a chemical reaction
Term
Endothermic reaction
Definition
A reaction where the total making and breaking of bonds results in an absorption of energy
Term
Exothermic reaction
Definition
A reaction where the total making and breaking of bonds results in a net release of energy
Term
Chemical equation
Definition
A short, easy way to show a chemical reaction using symbols instead of words
Term
Conservation of matter
Definition
A principle that states that during a chemical reaction, matter is neither created nor destroyed
Term
Open system
Definition
Matter can enter from or escape to the surroundings
Term
Closed system
Definition
Matter is not allowed to enter or leave
Term
Coefficient
Definition
A number placed in front of a chemical formula in an equation
Term
Synthesis
Definition
A reaction where two or more elements or compounds combine to make a more complex substance
Term
Decomposition
Definition
A reaction where compounds break down into simpler products
Term
Replacement
Definition
A reaction where one element replaces another in a compound, or when two elements in different compounds trade places
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