changes+in+the+states+of+matter

Description: (click on a link below)
·  Define matter as anything that has mass and takes up space. ·  Particles that make up matter are in motion. (These particles are atoms or molecules, but this terminology does not need to be introduced at this level.) Particles in solids sort of vibrate in position. Particles in liquids move faster as heat increases. Particles in gases move freely within the container. ·  Observe and measure physical properties of matter with senses and with appropriate tools. ·  Change the states of matter by melting, freezing, evaporating, and boiling (Students can model changes of state by using their bodies to represent the particles of matter.) §  Liquid ¨  Water to vapor (+ heat) or to ice (- heat) §  Solid ¨  Ice to water (+ heat) (or vapor - when ice evaporates without melting the process is known as sublimation. This happens in frost-free freezers. The air blowing provides enough energy for the ice to vaporize without melting. This is more easily seen with blocks of carbon dioxide - dry ice - that go directly from solid to vapor.) ¨  Additional examples of melting: butter, chocolate, ice cream, crayons §  Gas ¨  vapor to liquid (- heat)

=//Links://=