When you think about HEAT what comes to mind?

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Presentation transcript:

When you think about HEAT what comes to mind? Conduction Convection Beach Sun Heat Transfers Summer Ovens Radiation Waves VA Science SOL 6.3 b

Heat Transfers Heat goes from to The energy transferred from a hotter object to a cooler one is referred to as heat. Heat is transferred in three ways: radiation, conduction, and convection.

Radiation The heat you feel from the sun or a campfire travels directly to you as infrared radiation. You cannot see infrared radiation, but you can feel it as heat.

Conduction The direct transfer of heat from one substance to another substance that it is touching is called conduction. Conduction works well in some solids (such as land and metals), but not as well in liquids and gases (air and water do not conduct heat very well.)

Conduction Some materials, like metal, transfer heat more easily than others… A thermal infrared image of a coffee cup filled with a hot liquid. Notice the rings of color showing heat traveling from the hot liquid through the metal cup.

Convection This thermal infrared image shows mud pots, hot springs that do not have much water. Clay mixes with hot water to create mud. Hot steam rising from below causes the mud to bubble and pop. Infrared Mud Pots The transfer of heat by the movement of a fluid (molecules of liquids and gases) is called convection.

Convection Warm air rises! The upward movement of warm air and downward movement of cool air forms convection currents. Heat transfer in the air or water is an example of convection. COLD HOT

Energy in the Atmosphere Heat transfer by radiation Heat transfer by convection Heat transfer by convection Heat transfer by conduction Heat energy in the troposphere is transferred by a number of ways.

Some of this information came from the Prentice Hall, Science Explorer, 6th grade edition, 2004 book.