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6.P.3A.5 Convection, Conduction, and Radiation
Transcript of 6.P.3A.5 Convection, Conduction, and Radiation
heat moves easily from one object to another through direct contact in some materials (called conductors) and not so easily through other materials (called insulators).
Convection, Conduction, and Radiation
Conduction involves objects in direct
The transfer of energy as heat occurs between particles as they collide within a substance or between two objects in
All materials do
conduct heat energy equally well.
Poor conductors of heat are called
The energy transfers from an area of
temperature to an area of
For example, if a plastic spoon and a metal spoon are placed into a hot liquid, the handle of the metal spoon will get hot quicker than the handle of the plastic spoon because the heat is conducted through the metal spoon better than through the plastic spoon.
Convection is the transfer of energy as heat by
of the heated substance itself, as
in fluids (liquids and gases).
In convection, particles with
energy move from one location to another carrying their energy with them.
Heat transfer occurs when particles with higher energy move from warmer to
parts of the fluid.
can result in convection, both in the air and in water. This causes currents in the atmosphere (wind) and in bodies of water on earth which are important factors in weather and climate.
transfer of energy through space
particles of matter colliding or moving to transfer the energy.
This radiated energy warms an object when it is
●Radiant heat energy moves from an area of
temperature to an area of
Energy transfer as heat can occur in three ways:
Various individual materials and/or combinations of materials affect how
heat transfers by conduction, convection, or radiation.
Conductors are materials that
carry heat or electric current.
○ Glass and
are good conductors of heat. When a metal pan is placed on a heat source, it will quickly get hot and conduct the heat to whatever is inside of the pot.
● Insulators are materials that are
carriers of heat or electric current.
○ Wood and animal
(blubber) are good insulators; they do
conduct heat very well. A polar bear swims in freezing water but the bear does not freeze to death like a human would. The bear’s thick layer of fat insulates the bear and traps heat inside of the bear’s body.
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