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by Jackie Kemper

Updated 2/05

Important Words

Term Definition
Boiling Point The temperature at which a liquid bubbles and turns to vapor.
Bubbly  
Characteristic  
Condensation Point When a gas or vapor changes into a liquid.
Crystal  
Disintegrate To break into the small parts or particles making up something.
Dissolve To mix a material with a liquid so that the liquid is the same throughout it.
Energy  
Evaporate To pass from a liquid to a vapor.
Foamy Small bubbles formed on a liquid.
Flow To  move as in a stream.
Freezing  When a liquid changes to a solid.
Funnel A tool that looks like an empty cone with a tube coming out of the pointed end.
Gas A gas does not have a definite volume or shape. It takes on the shape, and completely fills up a container in which it is placed.. 
Invisible Unable to be seen.
Layer  
Liquid The state of matter where the material has a definite volume, but not a definite shape. A liquid takes on the shape of its container.
Matter Anything that takes up space and has mass.
Mixture Something that is made up of 2 or more materials which keep their own characteristics.
Melting Point Temperature when a solid changes to a liquid.
Observe To watch or look at carefully.
Opaque Not transparent or translucent - no light is let through
Particle A very small piece.
Pour To flow out.
Powder A solid made up of tiny particles or pieces.
Property A special quality of something.
Screen Wire that is used to separate larger particles from smaller.
Sieve A tool with tiny holes. It is used to separate larger pieces from smaller or solids from liquids
Sift To separate materials using a screen or sieve.
Solid The state of matter where an object has a definite shape and volume.
Surface  
Translucent Clear enough to let light pass through
Transparent Clear enough to see through a material 
Vapor Something that is in the gaseous state of matter.
Viscous Having the characteristic of stickiness.

If you would like the definition of a word that is not on this list, visit Merriam-Webster's Word Central.