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Harcourt Science
Physical Science - Matter and Its Changes
15
Science
4th Grade
09/30/2015

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Term
Matter
Definition
Everything in the universe that has mass and take-up space
Term
Mass
Definition
the amount of matter something contains
Term
Particles
Definition
small bits that make up matter
Term
Solid
Definition
matter that has a definite shape and takes up a definite amount of space
Term
Liquid
Definition
matter that takes the shape of its container and takes up a definite amount of space
Term
Gas
Definition
matter that has no definite shape and takes up no definite amount of space
Term
Volume
Definition
the amount of space that matter takes up
Term
Density
Definition
property of matter that compares the amount of matter to the space taken up
Term
Solution
Definition
a mixture in which the particles of different kinds of matter are mixed evenly with each other
Term
Dissolve
Definition
when one material forms a solution with another material
Term
Solubility
Definition
a measure of the amount of a material that will dissolve in another material
Term
Buoyancy
Definition
the ability of matter to float in a liquid or gas
Term
physical change
Definition
any change in the size, shape or state of a substance
Term
chemical change
Definition
a change that produces one or more new substances and may release energy
Term
chemical reaction
Definition
another term for chemical change
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