Are these natural or synthetic materials? Wood, cotton, wool, silk and leather.
Natural
Synthetic
What are raw materials?
Materials that have to be made naturally.
Materials made to make synthetic materials from the Earth's crust.
What is this the definition of? How good a material is at resisting a force.
Density
Hardness
Strength
What is this the definition of? How difficult a material is to cut into.
Melting point
Is this the definition of melting point? The temperature where a solid turns to a gas.
A material is good at not when a force is applied to it. A bendy material can still be as long as the force does not deform it.
Density is…
Mass per unit volume (g/cm3)
Joules per unit volume
Plastics are…
Fairly strong, hard and stiff. They are fairly low density. Some are mouldable.
Strong, flexible and mouldable.
Soft and flexible. They have good tensile strength.
Crude oil is…
A mixture of hydrocarbons.
A mixture of carbon dioxide and hydrogen.
Are these uses of crude oil? Petrol, diesel and lubricating oil.
