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Transcript of Cross-Bladed Scissors
The Romans invented the scissors that we know today
They were invented in 100 AD
Scissors used to be made of silver but now they are made of iron.
What Are Scissors Used For?
Cutting things like,
Why These Materials Were Chosen for Scissors
By Hannah Kennedy and Lauren Gilligan
January 2nd 2014
So your fingers don't hurt after use.
A strong material, so it cuts through most materials.
Major Materials of Scissors
Plastic is used in the making of scissors.
The handles of scissors are made of plastic.
Plastic is a mold-able material and is made of natural gases.
Iron is also used to build scissors.
The blades are made of iron and the screw is to hold them together.
Iron is a conductor, and it is a natural material.
Chemical and Physical Properties
Melting point : 320 degrees F
Boiling point: 392 degrees F
Density: 1.18 g/cm
Melting point: 2,800 F
Boiling point: 5,184 F
Density: 7.86 g/cm
Origin of Iron
Iron is the fourth most abundant element in the Earth's crust (5%)
It is found in China, Russia, Brazil, Canada, Australia, and India
Most commonly found in, China, Japan, United States, Russia, Germany, and Brazil.
Iron ore is first crushed to make iron, then it is melted. lastly it is molded to its normal scissor shape.
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