# HEAT TRANSFERS.

## Presentation on theme: "HEAT TRANSFERS."— Presentation transcript:

HEAT TRANSFERS

HEAT TRANSFER - the transfer of thermal energy between substances due to a difference in their temperature

THERMAL ENERGY is the total of all the kinetic and potential energy of all the particles in a substance.

TEMPERATURE is a measurement of the average kinetic energy of the molecules in an object. It is measured with a thermometer. It is a measurement of the internal energy contained in an object.

As the temperature increases, so does thermal energy (because the kinetic energy of the particles increased).

Cup gets cooler while hand gets warmer
The flow of thermal energy (HEAT) always flows from warmer to cooler objects Ice gets warmer while hand gets cooler

Questions 1. What is thermal energy?
How do you measure thermal energy? What is heat? 4. How does thermal energy flow?

Insert video clip – conduction, convection & radiation

CONDUCTION is the transfer of heat through a material by direct contact.

CONVECTION is the transfer of heat in a fluid (gas or liquid) as a result of the movement of the fluid itself

RADIATION is the transfer of heat via electromagnetic waves through space

How Are They Alike? Conduction Convection Radiation

How Are They Different? Conduction Convection Radiation

The spoon is too hot to touch after sitting in the hot soup.

Conduction, Convection, or Radiation? The moon’s surface becomes hot.

Your feet hurt after walking barefoot across the beach

Conduction, Convection, or Radiation? Bacon cooks in the frying pan