L7 Conduction

Open Ended

What is convection?

Mr. Parr: Radiation, Conduction, Convection

Poll

3 Spoons with Beads Attached by Butter

Make a hypothesis: Which will make the bead fall off first?

• plastic

• metal

• wood

What Material Conducts Heat Best?

Open Ended

3 Spoons with Beads Attached by Butter

Analyze the Data:

Why do you think the metal spoon melted the butter first?

Eureka! Conduction

CONDUCTION

Conduction is the process that
moves energy from one object to
another when they are touching
physically.
If you have ever picked up a bowl
of hot soup, you have experienced
conduction.
Conduction occurs any time that
objects at different temperatures
come into contact with each other.

CONDUCTION

The average kinetic energy of particles in the warmer object
is greater than that of the particles in the cooler object.
When particles of the objects collide, some of the kinetic
energy of the particles in the warmer object is transferred to
the cooler object. As long as the objects are in contact,
conduction continues until the temperatures of the objects
are equal.

Numbered Heads

#1 What is conduction?
#2 What is an example of conduction?

Open Ended

Each tack is held by wax on this metal piece.

When the metal piece is heated by the candle at one end, what do you think will happen?

Conduction Demo

Open Ended

What happened?

Why do you think this happened?

CONDUCTION IN REAL LIFE

Which of

these have

you

experienced?