Conductors and Insulators
Conductors and Insulators
Heat Transfer
Heat Transfer
Energy Forms
Energy Forms
100
What is the definition of a conductor?
Something that conducts (absorbs) heat well
100
What is the definition of an insulator?
Something that does not conduct (absorb) heat very well
100
Does heat rise or sink?
Heat rises because it becomes less dense
100
Does cold rise or sink?
Cold sinks, because heat rises, and cold moves to replace it.
100
What units is energy measured in?
Joules (J)
100
How many Joules in 1 kilojoule?
1000 joules
200
Warm clothes prevent you from losing radiant heat. Are they insulators or conductors
insulators
200
Are frying pans good conductors or good insulators?
Frying pans are good conductors
200
Do the molecules in a cube of ice move or are they completely still?
They still move a little.
200
Does an ice cube contain any heat energy?
Yes, even though it is cold it contains some heat energy
200
What is heat energy?
energy generated by the motion of atoms
200
What is mechanical energy?
The energy of movement
300
Are Styrofoam coffee cups insulators or conductors?
insulators. They don't conduct heat.
300
Is a log of wood a conductor or an insulator?
It is an insulator.
300
What is the lowest possible temperature, when molecules stop moving altogether?
0 kelvin, also known as 'absolute zero'
300
What method of heat transfer is this?
Conduction (energy transfer via contact)
300
What form of energy is stored in food?
Chemical Energy
300
What is chemical energy?
Energy released when the bonds that hold molecules together are broken
400
In the diagram below, will the stand and clamp heat up? Explain why/why not
The clamp and stand are insulators, and therefore will take a lot of energy to change temperature
400
in the diagram below, what will happen to the pin, which is stuck to the wire with wax?
the metal wire is a conductor, so it will heat up, melting the wax and causing the pin to drop.
400
What method of energy transfer is this:
Conduction (energy transfer via contact)
400
What method of heat transfer is shown in the photo:
Radiant heating
400
What is the law of conservation of energy?
Energy cannot be created or destroyed, only changed from one form to another.
400
What is radiant energy?
energy from the sun
500
Explain why the rug on your floor feels warmer than the tile in the same room. Use the terms insulator and conductor
the rug is an insulator, so does not conduct heat from your feet. The tiles are conductors, and will absorb the heat from your feet, making them feel cold.
500
Use your knowledge of particle theory and heat transfer to explain which spoon should you use from the diagram below:
the metal spoon with the wooden handle. Metal is a conductor and will heat up as the particles gain heat energy. The wooden handle is an insulator and will not.
500
What method of heat transfer is shown here:
Convection heating (movement of fluids between regions of different temperature)
500
Observe the experiment below. Explain using particle theory what will happen.
The particles of the metal rod will heat up starting at the bunsen burner and moving along. The paper clips will heat up one by one.
500
What is electricity?
The flow of electrons
500
What is nuclear energy?
Energy released during nuclear fission (splitting of atoms)
600
Imaging your holding a metal bar in one hand, and a piece of wood in the other. Which one will feel colder, and why? 
wood is an insulator, so is not absorbing the heat from your hand. Metal is a conductor, so is absorbing the heat from your hand, making it feel cold.
600
You have two metal containers, one of which is painted black. They are filled with water and placed near a heater. Which will heat up faster, and why?
The black container will heat up faster, because the shiny can is reflective, and will reflect some heat. So it is less conductive.
600
Why is it called infra red radiation?
Because its a form of non-visible radiation, at a lower frequency than red light.
600
What method of heat transfer is shown here:
Convection heating (movement of fluids)
600
What is sound energy?
Energy produced by the vibration of matter.
600
Complete the sentence: A hydroelectric power plant converts ______ energy to ______ energy
gravitational to electrical