C371: Concepts in Science (WGU) Exam
Questions with Correct Answers
Matter
Defined as anything that occupies space and has mass; all around us.
Solids
rigid and possesses a definite shape
Liquids
Flows and takes the shape of a container.
Gases
Takes both the shape and volume of its container.
Mass
A measure of the amount of matter in an object
Weight
A measure of the gravitational force exerted on an object.
,Law of Conservation of Mass
Matter is not created nor destroyed in any chemical or physical change
Pure Substances
A sample of matter, either a single element or a single compound, that has
definite chemical and physical properties. Constant composition.
Elements
any substance that cannot be broken down into simpler substances
Compounds
a thing that is composed of two or more separate elements that can be broken
down by chemical changes.
Mixtures
A combination of two or more substances that are not chemically combined; can
be separated by physical changes, such as evaporation.
heterogeneous mixture
A mixture with a composition that varies from point to point.
homogeneous mixture
(also, solution) combination of substances with a composition that is uniform
throughout
, physical property
A characteristic of a pure substance that can be observed without changing it into
another substance.
physical change
A change in a substance that does not change its identity or chemical composition.
chemical property
A characteristic of a pure substance that describes its ability to change into
different substances
chemical change
A change in matter that produces one or more new substances
extensive property
a property that depends on the amount of matter in a sample
Questions with Correct Answers
Matter
Defined as anything that occupies space and has mass; all around us.
Solids
rigid and possesses a definite shape
Liquids
Flows and takes the shape of a container.
Gases
Takes both the shape and volume of its container.
Mass
A measure of the amount of matter in an object
Weight
A measure of the gravitational force exerted on an object.
,Law of Conservation of Mass
Matter is not created nor destroyed in any chemical or physical change
Pure Substances
A sample of matter, either a single element or a single compound, that has
definite chemical and physical properties. Constant composition.
Elements
any substance that cannot be broken down into simpler substances
Compounds
a thing that is composed of two or more separate elements that can be broken
down by chemical changes.
Mixtures
A combination of two or more substances that are not chemically combined; can
be separated by physical changes, such as evaporation.
heterogeneous mixture
A mixture with a composition that varies from point to point.
homogeneous mixture
(also, solution) combination of substances with a composition that is uniform
throughout
, physical property
A characteristic of a pure substance that can be observed without changing it into
another substance.
physical change
A change in a substance that does not change its identity or chemical composition.
chemical property
A characteristic of a pure substance that describes its ability to change into
different substances
chemical change
A change in matter that produces one or more new substances
extensive property
a property that depends on the amount of matter in a sample
