UNIT 9

Some materials are

better for a purpose

than others.

Windows are made of glass because glass is transparent.

Houses are made from bricks because bricks are rigid.

Magnetism

Some objects are attracted to magnets.

These objects are magnetic.

Only objects made from metal are magnetic.

Bending

Twisting

Stretching

Squashing

Bend

Natural and Manufactured

materials

Natural materials are made by

nature.

Manufactured materials are made by people.

Many materials become hard when cooled and soft when heated.