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.
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
Power materials
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Power materials

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Power materials

  1. 1. UNIT 9
  2. 2. Some materials are better for a purpose than others.
  3. 3.  Windows are made of glass because glass is transparent.
  4. 4.  Houses are made from bricks because bricks are rigid.
  5. 5. Magnetism
  6. 6. Some objects are attracted to magnets.  These objects are magnetic. 
  7. 7.  Only objects made from metal are magnetic.
  8. 8. Bending Twisting Stretching Squashing
  9. 9. Bend
  10. 10. Natural and Manufactured materials
  11. 11.  Natural materials are made by nature.
  12. 12.  Manufactured materials are made by people.
  13. 13.  Many materials become hard when cooled and soft when heated.

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