Thermal Heat Transfer
What are the three types of thermal energy transfer?
Convection, Conduction, Radiation
What is thermal equilibrium?
The sun
Radiation
A student is standing with their back facing a sun. They know that thermal energy is being transferred from the sun and that this method of energy transfer can happen even if no air is present.
This method of energy transfer is —
Radiation
When a glass of milk is heated up, what happens to the particles?
They move faster.
An ice cube melting in your hand
Conduction
How does conduction transfer heat? What is needed?
Transfers heat because the particles vibrate up the object. It needs direct touch.
What direction does heat always move in?
Warm to Cold
The ocean currents
Convection
How does radiation transfer heat? What does it require to be transferred?
Through waves. It does not require any medium.
When a cup of water cold water is left out and warms up. What has happened to the particles?
The particles move faster and get further apart.
Think about lighting a match. Give an example of two kinds of thermal energy transfer that could be happening.
Convection: The heat rising
Radiation: The fire
How does convection transfer energy? What is needed in order for it to work?
Convection needs a liquid or gas to transfer energy. The warm particles rise and the cold particles fall, making convection currents.
If particles are moving quicker it has gained...
(what kind of energies and what has happened to the temperature?)
kinetic energy, thermal energy, and temperature
Think of a pot of boiling water. Give examples of convection, radiation, and conduction.
Conduction: Where the pot touches the stove
Convection: The water boiling
Radiation: The fire/burner