Marvellous metals, Unit 2, lesson 3


MARVELLOUS METALS


Watch the video and read the text:







Read the text:

Steel is an alloy, which means it’s a mix of two or more elements, mainly iron and carbon.

Why is steel so amazing?

Well, it's incredibly strong and durable, making it perfect for skyscrapers, bridges, and even cars!

The next time you drive over a bridge, you can thank steel for holding you up. 


Next, we have copper.

Copper might not seem as flashy as gold or silver, but it's essential in our daily lives.

This reddish-brown metal is an excellent conductor of electricity, which means it allows electricity to flow through it easily.

That's why copper is used in electrical wiring and circuits.

Fun fact- the Statue of Liberty is made of copper, and it’s green due to a process called oxidation!


Now, let's talk about aluminium.

Aluminium is lightweight, yet strong, and doesn’t rust.

This makes it perfect for airplanes, cans, and even some high-end bicycles.

Plus, it’s highly recyclable, which is great for the environment.

So, remember to recycle your aluminium cans, folks! 


Onto lead.

Lead has been used by humans for thousands of years.

It's dense and heavy, which makes it great for shielding against radiation.

However, lead can be toxic, so it's important to handle it with care.

These days, we find it in car batteries and protective gear for x-ray technicians.


And last but not least, mercury.

Mercury is quite unique because it's the only metal that's liquid at room temperature.

This shiny, silvery liquid is used in thermometers, barometers, and some electrical switches.

But, be cautious- mercury is highly toxic, so it must be handled under strict safety guidelines.


So…

Steel for strength, copper for conductivity, aluminium for lightweight durability, lead for protection, and mercury for its unique properties.

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