1. Examples: iron, steel and brass Sources: metal ores in Earth’s crust
METALS
Examples: iron, steel and brass
Sources: metal ores in Earth’s crust 1

2. Plastics
Examples: nylon and polystyrene
Source: crude oil 2

3. Ceramics Examples: china,bricks and pots
Sources: clay, sand and other materials 3

4. Glass Examples of glass: pyrex, lead and crystal
The sources of glass are: limestone and other materials 4

5. FIBERS Examples of materials: cotton, wool and polyestere
The sources of fibers are: plants and animals 5

6. 3) There is a better material for each situation.
FEATURES:
1 ) Number of materials
2) Factors of elements: Properties,the mass,any climatic,chemical and machining requirement
3) There is a better material for each situation.
4) MATERIALS ARE FROM THE ELEMENTS!
THE MATERIALS 6

7. 4 EXAMPLE OF ALL ELEMENTS
ALKALI METALS
ALKALINE HEART METALS
TRANSITIONAL METALS
OTHER MATERIALS
Tungsten
Aluminium
Hydrogen
Strontium
Sodium
Radium
Lead
Cobalt
lithium, potassium and other…
calcium, barium and other…
chromium, manganese and other…
Bismuth, polinium and other…
NON-METALS
NOBLE GASES
Arsenic
Sulfur
Elium
Xenon
oxygen, nitrogen and other…
Radon, krypton and other… 7

8. The ATOM
Electrons
Nucleus
Neutrons
Protons 8

9. Metals and Non-Metals 9

10. ALUMINIUM -Most common metal in the Earth
- difficult to extract it from rocks
-It is silver white in colour, ductile, malleable and an excellent conductor of electricity
-It is very useful in industries 10

11. LEAD RESISTANT MATERIAL IT’S USED IN…
IN BATTERIES,GLASS CERAMICS AND VARIOUS ALLOYS SUCH AS PEWTER AND SOLDER
LEAD IS RESISTANT TO OXIDATION,IT HAS BEEN WIDELY USED IN THE PAST FOR ROOFING AND WATER PIPES;IT HAS A LOW MELTING POINT
CHARACTERISTICS
COMMON METAL
IT IS A SHIELD AGAINST RADIATION AND IS A POOR CONDUCTOR OF ELECTRICITY AND RESISTS CORROSION BY ACIDS
THE LEAD IS RESISTANT TO OXIDATION,IT HAS BEEN WIDELY USED IN THE PAST FOR ROOFING AND WATER PIPES;IT HAS A LOW MELTING POINT

12. ORANGE-PINK VERY MALLEABLE DUCTILE COPPER AGE

13. Brass is an alloy Brass consists of copper mixed with zinc

14. -Applications -Elastic properties -Designers
Rubbers
-Applications
-Elastic properties
-Designers

15. TOOLS
Saw
Drill
Spanner
Hammer
Screwdriver
Pilers

16. SAW
Saw is used to cut wood or metals
the handle is made up of wood/plastic while the upper part of steel

17. HAMMER
It Is used to hammer nails The handle is made of wood/plastic while the upper part is made of iron and steel

18. DRILL
It is used to make holes The drill is made up of plastic and the drill bit of steel

19. SPANNER
It is used to loosen nuts It is made up of steel

20. PLIERS
It is used to bend wires The handle is made up of plastic or rubber while the upper part is made of steel

21. SCREWDRIVER
It is used to screw and unscrew The handle is made up of plastic or rubber while the upper part is made of steel

22. Grazie I nostri ringraziamenti vanno: Al D.S. Prof. Marzagalli
Alla Prof.ssa Parini, Alla Prof.ssa Crepaldi
Al Prof. Cacciato
Alla 2 ATER.