Chapter 10.3

Using Heat

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 warmerThis is energy being transferred by the work

being done by your hands.Processes that involve energy transfer by work

are called mechanical processes.

Using heat

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. 340This is another example of how your body

works like a heating system.

Using Heat

Other ways in which heat is generated.Heated water or air in central heating systems

Ex. Hot water heaterSolar heating systems

Reptiles basking in sunlight raises body temp.Solar panels also gather energy from sunlight

Using Heat

First paragraph on pg. 343

Insulation can help in both keeping warm air in, as well as keeping warm air out.

Insulation

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 anotherThus, 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.

Cooling Systems