1. Warm-up: Predict whether leaving the refrigerator door open on a hot summer day will help to cool the kitchen. Explain your answer.

2. Complete your notes by going to each learning station set-up around the room. Fill in your notes at each station! Once everyone has had a chance to go to each station we will discuss the topics as a class. While you are waiting to go to a station or you have completed all the stations work on your heat technology questions! Read the sections on pages 292-297 and answer the questions!

3. Heat Engine a device that transforms heat into mechanical energy. fuel combines with oxygen in a chemical change that releases thermal energy. burn the fuel in a process called combustion. When the fuel is burned inside the engine, the heat engine is called an internal combustion engine. When the fuel is burned outside the engine, the heat engine is called an external combustion engine.

4. The four strokes of the internal combustion engine

5. Thermostats a device that controls the heater in a home. thermal expansion causes a bimetallic strip to coil and uncoil based on the temperature in the room … this turns the heater on and off. A bimetallic strip is made of two different metals … bi(2) metallic(metal).

6. How a Thermostat Works

7. Refrigerators a device that keep items cool by continuously moving the thermal energy of the items inside the device to the outside. compressors use electrical energy to compress the refrigerant, which passes through the inside of the refrigerator and removes thermal energy as it travels back to the outside of the refrigerator. Refrigerant is a gas that has a boiling point below room temperature, which allows it to condense very easily.

8. How a Refrigerator Works

9. Heat Pumps a device that can heat or cool your home. Heat pumps are like refrigerators that can work in two directions. When a heat pump is used for cooling, thermal energy is extracted from the air in the house and pumped outside. When a heat pump is used for heating, thermal energy is taken from the air outside and is pumped inside.

10. How a Heat Pump Works

11. Geothermal Systems a device uses the thermal energy of the Earth to heat and cool your home. Like a heat pump, geothermal systems can work in two directions. When a geothermal system is used for cooling, thermal energy is removed from the air in the house and pumped through the earth where it cools off. When a heat pump is used for heating, thermal energy is absorbed from the earth and is pumped inside the home.

12. How Geothermal Systems Work

13. Engine https://www.youtube.com/watch?v=5NAht6YAXb8 Thermostat https://www.youtube.com/watch?v=6r9UAdb2kDo Refrigerator https://www.youtube.com/watch?v=qrcEWhurQl4 Heat Pump https://www.youtube.com/watch?v=KH47xAXEEe0 Geothermal https://www.youtube.com/watch?v=e1r7fXO0QII