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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.