Remember! Heat is transferred in three different ways:

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Presentation transcript:

Remember! Heat is transferred in three different ways: Radiation Conduction Convection

Radiation is the transfer of heat through empty space Radiation is the transfer of heat through empty space. Conduction is the transfer of heat through direct contact. Convection is heat transferred by the movement of a heated fluid. As a fluid is heated, it becomes less dense, it’s mass in relation to it’s volume decreases. This is why hot air rises and cold air sinks!

Radiation-Conduction-Convection

Heat always travels from hotter objects to cooler objects in three ways. Radiation! Heat transfer by electromagnetic waves. Examples include the sun, a campfire, microwave oven or nuclear radiation. Similar to the sun, the Earth gives off or radiates heat. Do living things radiate heat?

Remember: Most of the sun’s energy travels to Earth in the form of ________Radiation__________

Again! The radiation that comes to us from the sun travels in the form of electromagnetic, transverse waves!

Conduction! The direct transfer of heat from one substance to another (touching).Examples include feet on hot sand, a hand warmer, a pot on a stove, heat passing through the Earth.

Convection! The transfer of heat through a fluid (gas or liquid). Hot air vent (furnace blower), hair dryer, clothes dryer, “convection oven – stove,” hot air popcorn popper.