Class 8 Science | Properties of Mixed Metals

Science and Technology, Class 8

Properties of Mixed Metals

What an alloy is · Five properties · Steel, brass, bronze

What We Will Learn Today

🔍

Understand the definition of an alloy

⚙️

Learn why alloys are made

📋

Remember the five properties of an alloy

🍽️

Recognise steel, brass and bronze

At the goldsmith's shop

Twenty Four Carat or Twenty Two?

ASK

The mother asks for two tolas of twenty four carat bangles.

QUESTION

The goldsmith asks whether they will be worn daily or only at feasts.

ADVICE

If they are worn daily, make them from twenty two carat gold.

REASON

Pure gold is soft, mixed gold is hard.

The notes are free to read in full.

Presenter notes: Today's lesson is about alloys. Open by asking the class which metals they think their kitchen utensils are made of.