When you come in… 1.Complete entry ticket 2.Copy down today’s homework 3.Take out the Greenhouse effect worksheet, heat study guide and heat technology poster

How do you think they work?

You park your car outside on a hot summer day. When you put on your seat belt, what do you feel?

Specific Heat Capacity

Which one has the highest specific heat capacity? SubstanceSpecific Heat Capacity (J/kg  °C) Lead128 Gold129 Silver234 Metal of seat belt500 Aluminum899 Sand800 Cloth of seat belt1,340 Wood1,760 Water4,184

Example of specific heat capacity: Why is it cooler at the beach in the summer? Hint: Which has the higher specific heat capacity: the water or the sand? Answer: Water has a high specific heat capacity, so the water stays cool longer than the land.

Heat Technology Refrigerators- Cooling Takes Energy! The refrigerator transfers thermal energy from inside the refrigerator to the condenser coils at the back. This is why the back of a refrigerator feels warm!

Heat Pumps Dev ices that move thermal energy from one location to another. Example: Air Conditioner Moves thermal energy from inside the house to the outside

Wait? Doesn’t that go against the rule that heat always moves from hotter to colder? Air conditioner

Heat Engines – Machines that use heat to do work. They convert thermal energy into kinetic energy. Heat Engines Internal External

Internal Combustion Engine- Fuel burns inside the engine in chambers called cylinders. Example: car engine

External Combustion Engine- Fuel is burned outside the engine. Example: steam engine