THERMAL ENERGY Great videos to engage students * 07/16/96 THERMAL ENERGY Great videos to engage students https://www.youtube.com/watch?v=-7SRr-bnsKY https://www.youtube.com/watch?v=f1eAOygDP5s https://www.youtube.com/watch?v=xgOlB4TmbBY *

Thermal Energy Thermal energy is the kinetic energy of moving particles in an object. It depends on temperature, mass, and type of substance.

Temperature is the measure of how hot or cold something is. * 07/16/96 Temperature Temperature is the measure of how hot or cold something is. https://www.youtube.com/watch?v=yxBTEMnrZZk&index=2&list=PLMi9VJQhTzF5zi9PKVLammAs1XsJFjs9I Eureka! Episode 21 Temperature vs Heat *

Temperature Temperature is the average kinetic energy of moving particles in matter. Higher Temperature 

Thermal Energy Relationships As temperature increases, so does thermal energy because the kinetic energy in the particles increased.

Thermal Energy Relationships Even if the temperature doesn’t change in an object, the thermal energy in a more massive substance is higher.

Thermal Energy Relationships * 07/16/96 Thermal Energy Relationships Which beaker of water has more energy? 200 mL 80ºC A 400 mL B Click once more for A to disappear. Even though they have the same temperature B has more mass. *

Heat Heat is a measure of how much thermal energy is transferred from a warmer substance to a cooler substance.

Heat Transfer Heat transfer is the flow of energy from one object to another. Heat always flows from the warmer object to the colder.

Heat Transfer Cup gets cooler while hand gets warmer. Ice gets warmer while hand gets cooler.

Heat Transfer A B 80ºC 10ºC Why does A feel hot and B feels cold? * 07/16/96 Heat Transfer Why does A feel hot and B feels cold? 80ºC A 10ºC B Heat flows from A to your hand = hot Heat flows from your hand to B = cold *

Land heats up and cools down faster than water. Specific Heat Some things heat up or cool down faster. Land heats up and cools down faster than water.

Heat Transfer - Conduction Conduction is the transfer of thermal energy from particle to particle between two objects that are touching.

Heat Transfer - Conduction * 07/16/96 Heat Transfer - Conduction https://www.youtube.com/watch?v=tpkyuqial8o&index=3&list=PLMi9VJQhTzF5zi9PKVLammAs1XsJFjs9I Eureka! Episode 24 Conduction *

Heat Transfer - Conduction Examples: A pot gets hot on the stove. A coin gets warmer the longer you hold it in your hand. YOUR TURN: Put a coin in your hand. I will set the timer for 1 minute and then 2 minutes. What do you observe?

Heat Transfer - Conduction * 07/16/96 Heat Transfer - Conduction How does this picture show conduction? The rod is being heated by the flame because it is directly over it. Then the hand would be getting warm because heat would be traveling down the rod. *

Insulator A material limits how much heat can go through it.

Insulator Examples: A cooler keeps drinks cold. A wooden pot handle is safe to touch. A marble floor feels cool. A jacket keeps you warm.

Explain how these wooden stirring spoons show insulation. Insulator Explain how these wooden stirring spoons show insulation.

Heat Transfer - Convection * 07/16/96 Heat Transfer - Convection Convection is the transfer of thermal energy by the movement of fluids. https://www.youtube.com/watch?v=NuxMRpWvsdw&index=4&list=PLMi9VJQhTzF5zi9PKVLammAs1XsJFjs9I Eureka! Episode 27 Convection *

Heat Transfer - Convection

Heat Transfer - Convection Example: The Part of the ocean near the surface is warmest. The bottom is coldest.

Heat Transfer - Convection * 07/16/96 Heat Transfer - Convection Explain how this picture shows convection. *

Heat Transfer - Radiation * 07/16/96 Heat Transfer - Radiation Radiation is the transfer of heat energy by waves moving through space. ALL objects radiate energy. https://www.youtube.com/watch?v=2JZciWtK6vc&list=PLMi9VJQhTzF5zi9PKVLammAs1XsJFjs9I&index=5 Radiation (Eureka!) *

Heat Transfer - Radiation

Heat Transfer - Radiation Example: Heat lamps keep food warm on a serving bar.

Explain how this photo shows the three forms of energy transformation. Heat Transfer – Review Explain how this photo shows the three forms of energy transformation.

Heat Transfer Video Clip

Thermal Energy Thermal energy is the __________ energy of all the particles in an object. Thermal energy depends on ____________, _______________, and type of substance. Temperature is the measure of how _____________ or ____________ something is. As temperature ________________ so does thermal energy because the _____________ energy in the particles ________________. Heat ____________ is the flow of energy from one object to another. Heat always flows from the ___________ object to the ____________. Some things heat up or cool down __________________. _______________ heats up and cools down faster than ___________.

_________________ is the transfer of thermal energy by direct contact between two materials with different temperatures. How does this picture show conduction? ___________________________________ _________________ is the transfer of thermal energy through a liquid or a gas with different temperature. Explain how this picture shows convection. _________________________________ __________________________________ _______________________ __________________ is the transfer of heat energy by waves moving through space. _________objects radiate energy. Example of Conduction: Example of Convection: Example of Radiation: