materialsproperties_wordle

Different materials have different properties.

PROPERTIES OF MATERIALS
resistant vs. fragile
rigid vs. flexible
elastic vs. non-elastic
transparent vs. opaque
heat conductor vs. heat insulator
water-resistant vs. non-water resistant
waterproof vs. non-waterproof

resistant_fragile

A resistant material is difficult to break. It’s very strong.
A fragile material is easy to break.

A rock is resistant .
Glass is fragile.

rigid_flexible

A rigid material cannot be bent.
A flexible material can be bent easily.

A brick is rigid.
Paper is fragile.

ElasticRubberBand1_460

An elastic material returns to its original shape when the force stops.
It returns to its original shape after we bend it or strech it.

A non-elastic material will keep its new shape when the force stops.

A rubber band is elastic.
A brick is non-elastic.

transparent1_460

Light can pass through a transparent material.
We can see through a transparent material.

Glass is transparent.

OpaqueBrickWall1_460

Light can’t pass through an opaque material.
We cannot see through an opaque material.

A brick wall is opaque.

Water can’t pass through a waterproof material.

Rain boots are waterproof.
Raincoats are waterproof.
Umbrellas are waterproof.

GOOD TO KNOW
waterproof vs. water-resistant

WATERPROOF
Highest level of protection.
Impervious to water.

WATER-RESISTANT
Lowest level of protection.
Able to resist the penetration of water, but not entirely.

pan2

The pan is made of metal because it is a heat conductor.
The handle is made of wood (or plastic) because it is a heat insulator.

pan

Heat passes through heat conductors easily.
The metal in the pan is a heat conductor.

Heat can’t pass through heat insulators easily.
The wood (or plastic) in the handle is a heat insulator.

PEDROLEÓN.