Brass is an alloy of copper and zinc.

Bronze is composed of copper and tin.

Brass is an alloy of copper and zinc.

It was around the beginning of the bronze age,

The 5 yen coin is made from brass and the 10 yen coin is made from bronze.

You view the bond in the triangle.

Bronze ware is largely made from alloys of brass and tin.

They cast bronze into a statue.

Everything you see in this picture is commercial grade copper, lead, silver, zinc and gold.

Their history actually goes back to about the time of Christ.

You owe me three farthings say the bells of St Martin's.

I got the bronze!

Copper.

Here is an example of the same symbol on an ancient Chinese bronze inscription.

Lead is the axis to this pencil

A shiny nickel.

Copper. Right.

Pencil

So based on the research by Marcelo Coelho from MlT,

You know those fat, old TVs that people are chucking for high def flat screens?

It's zinc.

Your eyes, and then your brain, are collecting all sorts of information about the pencil its size, color, shape, distance, and more.

Pencil size

Have you got lead in there? Let me, uncle Vova.

What's inside?

I'd say zinc.

(Laughter)

And no pennies.

And three, that is not John Harvard.

New paper. Have some pencils.

It's oilrubbed copper.

The bronze statue was broken into pieces.

Copper and silver are both metals.

Copper conducts electricity well.

Whose pencil is this?

Latin'plumbum 'for Lead

Do you think the zinc really works?

Now we can fast forward many thousands of years into the Bronze Age and beyond.

Copper conducts electricity well.

Electricity cables are made of copper.

Mandela, the great man Mandela.

I've lost my pencil.

I have lost my pencil.

This is a pencil.

That is a pencil.