Heat and Electricity

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Heat and Electricity

• Review

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Which material would be a better conductor of
heat? Wood or metal?
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Metal
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Is plastic an insulator or a conductor?
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Insulator
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Metals allow heat to travel through them easily.
What are they called?
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Conductors
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When making a circuit, what could you do to keep
the wires from getting too hot? Would you
insulate the wires with a metallic material or a
rubber material?
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Rubber Material
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A material that allows a current to pass through
it easily is called a
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Conductor
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Give an example of a household activity that
involves the use of radiation.
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Cooking food in a microwave oven.
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The coils on a stove cause a cooking pot to heat
up. This is an example of heat being________
from one object to another.
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Conducted
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What does your winter coat act as?
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An insulator
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What kind of spoon would you NOT want to use to
stir a hot pot of soup on the stove?
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Metal
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A current is a continuous flow of electricity.
What happens when one part of a circuit is not
connected?
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It will not allow electricity to flow and it will
not light up the bulb.
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When you lay on the beach, you feel the warmth of
the sun. What type of heat transfer occurs when
this happens?
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Radiation
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What type of material is electrical wire
typically made out of?
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Copper
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If you want to insulate a can of soda, which
material would be the best to wrap the can in to
keep it cold?

• Aluminum foil, plastic wrap, was paper, or paper
  towels

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Paper Towels
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Ice skating, lighting a match, and rubbing your
hands together all create heat from?
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Friction
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Electricity can be transformed into heat.

• True or False

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True
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Electricity is a form of ______.
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Energy
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Heat, light, and transportation rely on ______.
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Electricity
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What does a solar cooker use to heat food?
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Sunlight
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Heat is a form of ______.
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Energy
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Rubbing two sticks together is an example of
producing heat by _______.
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Friction
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You leave a bottle of sunscreen, a bottle of
water, a beach towel, and two quarters in the car
on a hot sunny day. Which item will get the
hottest?
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Quarters
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Molecules (speed up/slow down) when they are
heated.
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Speed up