Steel is strong material made of iron and carbon. True or false?
true
15
Polymer is a mixture of metal and another material. True or false?
False. It is an alloy
15
Ceramics are hard material that do not melt. True or false?
True
15
Rebar is wood used for constructing building. True or false?
False. Lumber is used for construction
15
Concrete is used to make cars. True or false?
False. It is used for building construction
15
Polymers are classified into___________and____________
natural and artificial
15
Lumber is an artificial susbstance developed in labs. True or false?
False. It is a natural material
15
The ability of a material to resist deformation and return to its original shape when a force is removed is called________
Elastic limit
15
The maximum stress a material can endure without permanent deformation or breaking is _________________
Yield strength
15
The property of a material to reflect light and shine with a polished or shiny surface
Luster
15
The measure of a material's resistance to scratching, abrasion, or penetration by another material or object.
Hardness
15
The energy-absorbing capacity of a material, which allows it to deform plastically and absorb impact without breaking.
Toughness
15
A /an ___________________is a material that does not conduct electricity or heat easily due to its high electrical resistance or low thermal conductivity.
insulator
15
Dirt, wood and water are all _____________materials
natural
15
A very ductile material changes shape without breaking. True or false?