Chapter 10.3

Heating system – any device or process that transfers energy to a substance to raise the temperature of the substance. By rubbing your hands together, they become warmer This is energy being transferred by the work being done by your hands. Processes that involve energy transfer by work are called mechanical processes.

Your body is a heating system. The body maintains a certain temp. (98.6°F) Whether you are in a place that is cool or hot. Paragraph at bottom of pg. 340 This is another example of how your body works like a heating system.

Other ways in which heat is generated. Heated water or air in central heating systems Ex. Hot water heater Solar heating systems Reptiles basking in sunlight raises body temp. Solar panels also gather energy from sunlight

First paragraph on pg. 343 Insulation can help in both keeping warm air in, as well as keeping warm air out.

Cooling System - a device that transfers energy as heat out of an object to lower its temperature. In all cooling systems, energy is transferred as heat from one substance to another Thus, leaving the first substance with less energy and lower temp. Refrigerant – a substance used in cooling systems that transfers large amounts of energy as it changes state.