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Thermal Energy Answer Key

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Temperature
#1 The transfer of energy moves from an object with? temperature to and object with? temperature High to low
#2 Name the three scales used on a thermometer Celsius, Farenheit and Kelving
#3 What is the temperature when all molecular motion stops? Absolute zero
#4 If the particles of an object have high average kinetic energy, is the temperature high or low? Hight
#5 Who invented the thermometer Galileo
Heat Transfer
#1 What happens when an object at a hight temperature touches an object at a lower temperature Heat energy moves from higher to lower temperatures
#2 When both objects reach the same temperature this is called Equalibrium
#3 How is heat transferred in a pan on a stove burner. Conduction
#4 How is heat transferred through a solid. By one particle at a time
#5 What type of material slows down the movement of heat energy? Insulators
Convection and Radiation
#1 How is heat transferred in liquids and gases? Convection
#2 In the convection tubes, the hot water is more or less dense than the cold water? Less dense
#3 The transfer of thermal energy by electromagnetic waves is called? Radiation
#4 Which type of thermal energy transfer does not need particles of matter to move heat? Radiation
#5 Identify the type of heat transfer-Roasting a hot dog over a campfire (Lightis invovled) Radiation
Examples of Heat Transfer
#1 Identify the type of heat transfer-Heating pad you are sitting on Conduction
#2 Hot air circulating in a room via the furnace convection
#3 How does your coat keep you warm? Traps air between you and the coat.
#4 Is a sytrofoam cup an insulator or a conductor? Insulator
#5 Is copper tubing(metal pipe) an insulator or a conductor? Conductor
Thermal Energy
#1 When an object is heated, what happens to the molecules of that object? Speed up
#2 If an object is heated does the particles expand or do the space between the particles expands? Space between the particles
#3 Why do bridges and roads have expansion joints? To allow for thermal expansion
#4 When this object was heated, what happened? And what was this called? It is expanded, Thermal Expansion
#5 Which has more thermal energy-an iceberg or the cup of coffee? Why? Ice berg-more particles
Final Question
What is the Greenhouse effect? The warming of the Earth-due to the trapping of infrared heat.