ENERGY: CONSERVATION AND TRANSFER
VOCABULARY Transfer: to carry or transport from one place to another
Conduction: the direct transfer of heat between objects that touch Convection: the transfer of heat in a liquid or a gas; warm rises, cool sinks Radiation: the transfer of thermal energy by electromagnetic waves Convection cell: a change in temperature in a liquid or a gas that results in a cycle or pattern; warm rises, cool sinks Electromagnetic waves: energy in the form of magnetic and electric waves (x-rays, microwaves, and radio waves) Thermal energy: energy generated and measured by heat Heat: a form of energy associated with the movement of molecules in any material. The higher the temperature, the faster the atoms are moving, and the greater the amount of energy present as heat. Light: electromagnetic radiation of a wavelength that is visible to the human eye; radiant energy; it allows us to see things Temperature: a measurement of the amount of heat in a substance Physical change: a change in size, shape, or state without changing the chemical makeup of something Chemical change: a change in matter in which new matter forms or is created Chemical reaction: when a substance (or a few substances) change into another substance. Chemical reactions are chemical transformations. Heat always transfers from hot to cold: quickly moving molecules of the hotter object bump the cooler molecules and transfer energy and heat making the cooler molecules warm up and begin moving faster |
STANDARDS5.P.3 Explain how the properties of some materials change as a result of heating and cooling.
5.P.3.1 Explain the effects of the transfer of heat (either by direct contact or at a distance) that occurs between objects at different temperatures. (conduction, convection or radiation) 5.P.3.2 Explain how heating and cooling affect some materials and how this relates to their purpose and practical applications. |