Energy

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Energy Transfer
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Energy can MOVE from one place to another (like
lightning)!
This is called Energy TRANSFER
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Energy always transfers to a place that has
LESS energy.
The ice has LESS thermal energy, so the drink
TRANSFERS energy to the ice, causing it to melt!
Think of it like sharing giving energy to a
place that doesnt have as much.
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There are 3 ways to TRANSFER energy

• Conduction
• energy transferred by touching

The fork will conduct electricity when it touches
the outlet.
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2) Radiation energy transferred without
touching
The fires thermal energy is radiating out to
warm the room
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3) Convection energy transferred when
heat rises, then cools in a circular motion.
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Can You Identify the Energy Transfer?
Decide if each example shows conduction,
radiation, or convection.
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You can burn your hand from putting a metal stick
in the candle flame.
Conduction because you were actually touching it.
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Getting an X-ray
Radiation, because it doesnt touch you
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It is hotter in your attic and upstairs than it
is downstairs.
Convection because the heat is rising, while the
cool falls.
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Lightning burning a tree
Conduction because it touches the tree
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Getting cooked from the inside out by an atomic
bomb
Radiation because you arent touching the bomb
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Water boiling in a pot
Convection because the heat rises and cools in a
circular motion.
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Cooking in the microwave
Radiation because nothing actually touches your
food.
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Static shock from a doorknob
Conduction because you had to touch the doorknob
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Toasting (not burning) a marshmellow
Radiation because no touching
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Lava lamp bubbling
Convection, because the heat of the lightbulb
makes the bubbles rise and fall in a circle.