TODAY IS CONDUCTION DAY.

Read the title.

Today, i'm gonna talk all about conduction.

CONDUCTION CONDUCTION CONDUCTION CONDUCTION CONDUCTION CONDUCTION CONDUCTION CONDUCTION

CONDUCTION!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

So, important question.

WHAT IS CONDUCTION??!

Here's a few definitions, conduction is:

- the energy transfer that is mostly best in solids

(This is because liquids and gases are poor conductors of heat, compared to solids)

- the transfer of thermal energy through a medium, without the medium moving

- the process of thermal energy transfer without any flow of the material medium

They actually all mean the same thing, but just can be expressed in many different ways :D

An example of comduction in solids would be this:

As you can see from the image above, as the wax on the rod melts, the thumbtacks fall off . This is because thermal energy is transfered from the flame (hotter region) towards the cooler end of the rod (cooler region). From here we can also prove another point that it is indeed true that thermal energy flows through the material of the rod without any flow of the material itself.

As for this image above, you can see that there are 3 rods, and they all have wax at the ends of the rods. An experiment was actually carried out and certain waxes actually melted and dropped off first. This was because each rod was made out of a different material. This can let us conclude that different materials conduct heat at different rates.

In general:

Good conductors of heat would be metals, such as copper, silver, steel and iron.

Insulators of heat or bad conductors would be non metals such as plastic, wood, glass, brick, air, water and wood.