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Chapter 2 - States of Matter
Vocabulary - Gr. 6
14
Science
6th Grade
02/07/2012

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Term
Atom
Definition
the smallest particle of an element
Term
Matter
Definition
anything that takes up space and has mass
Term
Solid
Definition
matter with a definite shape and volume; has tightly packed particles that move mainly by vibrating
Term
Liquid
Definition
matter with definite volume but no definite shape that can flow from one place to another
Term
Viscosity
Definition
a liquid's resistance to flow; the thicker the liquid the higher the viscosity
Term
Surface tension
Definition
the uneven forces acting on the particles on the surface of a liquid
Term
Gas
Definition
matter that does not have a definite shape or volume; has particles that move at high speeds in all directions
Term
Thermal energy
Definition
the total kinetic and potential energy of all the particles in a sample of matter
Term
Temperature
Definition
measure of the average kinetic energy of the individual particles of a substance
Term
Heat
Definition
movement of thermal energy from a substance at a higher temperature to a substance at a lower temperature
Term
Melting
Definition
change of matter from a solid state to a liquid state
Term
Freezing
Definition
change of matter from a liquid state to a solid state
Term
Vaporization
Definition
the process by which a liquid changes into a gas
Term
Condensation
Definition
the process of changing from a gas to a liquid
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