PROPERTIES OF MATERIALSMATERIALS CAN BE:

RESISTANT (BREAK) FRAGILE

RIGID (BEND) FLEXIBLE

TRANSPA-

RENT

(LIGHT) OPAQUE

PER-MEABLE

(WATER) WATER

PROOFHEAT

CONDUCTORS(HEAT) HEAT

INSULATORS

ELASTIC

KEY WORD

RESISTANT MATERIALS ARE DIFFICULT TO BREAK

FRAGILE MATERIALS BREAK EASILY

A RIGID MATERIAL DOESN’T BEND EASILY

A FLEXIBLE MATERIAL BENDS REALLY EASILY

AN ELASTIC MATERIAL RETURNS TO ITS ORIGINAL SHAPE

LIGHT CAN PASS THROUGH A TRANSPARENT MATERIAL

LIGHT CAN’T PASS THROUGH AN OPAQUE MATERIAL

WATER CAN PASS THROUGH A PERMEABLE MATERIAL

WATER CAN’T PASS THROUGH A WATERPROOF MATERIAL

CURIOUS FACTS:

Our skin is waterproof.

Birds like penguins or gannets need to fish in the water, so they have WATERPROOF feathers.

A gannet fishing

HEAT CAN PASS THROUGH HEAT CONDUCTORS EASILY

HEAT CAN’T PASS THROUGH HEAT INSULATORS EASILY

NATURAL MATERIALS COME FROM NATURE.

THEY CAN COME FROM PLANTS.

wood

cotton

Natural rubber

THEY CAN COME FROM ANIMALS

wool

leather

silk

They can come from minerals

oil

MANUFACTURED MATERIALS: They are made from natural materials that are transformed into

manufactured ones through a manufacturing process. This process normally takes place in

factories

From wood we obtain paper, books, pencils, furniture, etc.

From cotton we get clothes, pillows, bedding, etc.

From natural rubber we take tyres, clothes, rubbers for school, etc.

From wool we obtain clothes, wool string, blankets, etc.

From leather we get clothes,rugs, etc.

From silk we get clothes, bedding, etc.

From oil we obtain plastic,

nylon for clothes, fuel,

etc.

From sand we get glass