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Physical Science 1
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17
Science
8th Grade
09/07/2015

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Term
Matter
Definition
Anything that takes up space and has mass.
Term
Atoms
Definition
The smallest particle of matter that maintains the characteristics of that matter.
Term
Elements
Definition
Pure substances that cannot be broken down into any other homogeneous substances. Made up of only atoms.
Term
Mixtures
Definition
Two or more elements or compounds that are in the same place, but not chemically combined.
Term
Compounds
Definition
Chemical combination of elements that are in a set ratio and cannot be separated into original parts.
Term
Substances
Definition
Single kinds of matter that are pure.
Term
Homogeneous
Definition
Consisting of all the same parts; alike.
Term
Heterogeneous
Definition
Diverse in character or content.
Term
Physical Properties
Definition
Properties of matter that can be observed without changing the substances.
Term
Chemical Properties
Definition
Characteristics of a substance that describe its ability to change into a new substance.
Term
Metric System
Definition
A base ten system of weights and measurements that is used in science; the meter, gram, and liter are its basic units.
Term
Density
Definition
A physical property used to identify an unknown substance.
Term
Condensation
Definition
Occurs when particles in a gas lose enough thermal energy to form a liquid.
Term
Viscosity
Definition
A liquid's resistance to flowing; depends on the size and shape of the particles of that liquid.
Term

Surface Tension

 

Definition
The attraction of one water molecule of water to another water molecule.
Term
Evaporation
Definition
Vaporization at the surface.
Term
Thermal Expansion
Definition
The tendency of matter's volume to change because of a change in temperature, through heat transfer.
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