2.  Particles are always moving and always have energy.  When an object is hot… the molecules are moving_____________.  When an object is cold…the molecules are moving _____________.

4.  Heat is the energy that the object has because the particles are moving.  Temperature is a way of measuring heat energy.

5. FFahrenheit (°F) CCelsius (°C)

6. Water FreezesWater Boils Fahrenheit32°212° Celsius0°100°

8.  What is heat? › Heat: Thermal energy moving from a warmer object to a cooler object. › When do you hear heat described? › Heat always travels from a __________ object to a ___________ object.

10.  3 ways… › Conduction › Convection › Radiation

11.  Heat transfers through a substance or from a substance to another by direct contact  Examples: › Raw egg fries as it hits a heated frying pan › Metal spoon in pot of hot water

13.  Heat transfer in liquids and gases as particles circulate in currents  Example: › When the water at the bottom of a pot is heated, it moves to the top. As the water rises, the surrounding cooler water flows into place.

15.  Transfer of heat through space in the form of waves.  Example: › Radiation of heat from a bonfire or lamp › The heat from the sun

17.  Conductor: material that transfers heat well. (pulls the heat to the outside) › Example: metals (stainless steel & silver)  Insulator: material that does not transfer heat well. (keeps the heat in) › Example: wood, wool, straw, paper, gases