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Stack #1099647

Psysical Science - Ch. 2 - Matter

QuestionAnswer
The scientific study of the composition, structure, and properties of matter and the changes that matter undergoes. chemistry
Anything that has mass and occupies space. matter
A substance that cannot be separated or broken down into simpler substances by chemical means. element
The smallest unit of an element that maintains the properties of that element. atom
A substance made up of atoms of two or more different elemens joined by chemical bonds. compound
The smallest unit of a substance that keeps all of the physical and chemical properties of that substance. molecule
A combination of chemical symbols and numbers to represent a substance. chemical formula
A sample of matter, either a single element or a single compound that has definite chemical and physical properties. pure substance
A combination of two or more substances that are not chemically combined. mixture
The temperature at which a solid becomes a liquid. melting point
The temperature at which a liquid becomes a gas. boiling point
The ratio of the mass of a substance to the volume of the substance. density
The capacity of a substance to combine chemically with another substance. reactivity
The ability of a substance to react in the presence of oxygen and burn when exposed to a flame. flammability
A change of matter from one form to another without a change in chemical properties. physical change
A change that occurs when a substance changes composition by forming one or more new substances. chemical change
Created by: 1125234467
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