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### 22 Cards in this Set

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 What are the UNITS of measurement SPECIFIC HEAT? J/(kg K) OR J/(g C) What is CONDUCTION? The transfer of thermal energy (heat) or electrons (electricity) between particles that are touching. What is the specific heat of water? 4,180 J/(kg K) Is wood a conductor or an insulator? Insulator What FORMULA is used to calculate a CHANGE IN THERMAL ENERGY? Change in thermal energy = mass x specific heat x change in temperature OR ^E = m x cp x ^T What is the direction of heat flow between substances? From a substance at a higher temperature to a substance at a lower temperature. What is SPECIFIC HEAT? The amount of energy required to raise the temperature of 1 kilogram of a substance by 1 kelvin OR to raise 1 g of a substance by 1 degree Celcius. Is a gas, such as air, a good conductor or insulator? Insulator What is HEAT? The movement of thermal energy from a substance at a higher temperature to a substance at a lower temperature. How does radiation differ from conduction and convection? Radiation can travel through a vacuum. Conduction and convection both require a medium to move through. What is a CONDUCTOR? A substance through which electrons move freely, transmitting heat or electricity. Are ceramics and tiles good conductors or insulators? Conductors What form of heat transfer is used to heat food using a heat lamp or roast marshmallows and hot dogs? Radiation What is CONVECTION? The transfer of thermal energy by the movement of currents in a fluid (liquid or gas). How does fiberglass behave as an insulator? A tangle of thin glass fibers traps air. Air is a poor conductor of heat and trapped air can not transfer heat by convection. Is plastic a conductor or an insulator? Insulator Are metals good conductors or insulators? Conductors What is RADIATION? The transfer of energy (light or heat) by electromagnetic waves? What are three methods of heat transfer? Conduction, convection, and radiation. What is an INSULATOR? A material that does not easily transfer thermal energy or electric current between its particles. How do feathers on a bird or in a down jacket provide insulation? They trap air which is a poor conductor of heat. Also, trapped air can not transfer heat through convection. How can window shades or awnings keep a house cooler on a sunny day in summer? It blocks radiation from the sun.