Conductors and Insulators
Heat Transfer 1
Heat Transfer 2
Heat Transfer 3
100
Which is a better conductor?
Metal is a better conductor.
100
Why do hot fluids rise and cool fluids sink?
Hot fluids rise because they become less dense and cool fluids sink because they become denser.
100
Heat moves from the _____ object to the ______ object.
hotter ; cooler
100
Feeling warmth from a campfire.
Radiation
200
Warm clothes prevent you from losing heat through radiation. Are they insulators or conductors?
insulators
200
The transfer of heat energy from the sun to Earth.
Radiation
200
The current of hot magma rising and cool magma sinking.
Convection
200
Accidently burning your hand on a hot metal pan.
Conduction
300
Are styrofoam coffee cups insulators or conductors?
Insulators. They don't conduct heat.
300
Do the molecules in a cube of ice move or are they completely still?
They still move a little. Cool things still have heat energy that moves the molecules.
300
What method of heat transfer is this?
Conduction (energy transfer via contact)
300
Radiation is when _____________ waves travel through space, without direct contact.
electromagnetic
400
What is the definition of an insulator? Provide one example of an insulator.
An insulator is a material that does not conduct heat well. Wool socks are an insulator.
400
What method of energy transfer is this?
(Description: Heat flows from the hotter cup into the cooler hands. )
Conduction (energy transfer via contact)
400
What process of heat transfer can be shown using a lava lamp?
Convection
400
What is one way you can protect yourself from the sun's radiation?
Wear sunblock. Wear protective clothing. Don't go out as much when the sun is its brightest.
500
Explain why a metal spoon feels warmer than a plastic one in the same cup of hot tea. Use the terms insulator and conductor.
The plastic spoon is an insulator, so it does not conduct heat from the tea. The metal spoon is a conductor and it will absorb the heat from the tea, making it feel warmer.
500
What method of heat transfer is shown here?
Convection heating (hot fluid rises, cool fluid sinks)
500
Describe an example of radiation.
Answers will vary. The warmth we feel from a fire.
500
Explain why it’s much colder at the bottom of a pool than at the top. Also, describe what heat transfer processes are taking place.
Convection makes the cool water sink and hot water rise. Radiation heats the surface of the water and may not penetrate down to the bottom.
600
Explain one example of a conductor and one example of an insulator you use while cooking.
An oven mitt, rubber-coated handles on pans and pots, and rubber and plastic utensils are all examples of insulators. Pots, pans, and metal baking sheets are all examples of conductors.
600
What are two different units we use to describe temperature in science?
Celsius and Kelvin
600
Describe an example of convection.
Answers will vary. The convection currents in the ocean and atmosphere.
600
Describe an example of conduction.
Answers will vary and must involve direct contact.