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

Plastics Examples: nylon and polystyrene Source: crude oil 2

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

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

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

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

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

The ATOM Electrons Nucleus Neutrons Protons 8

Metals and Non-Metals 9

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

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

ORANGE-PINK VERY MALLEABLE DUCTILE COPPER AGE

Brass is an alloy Brass consists of copper mixed with zinc

-Applications -Elastic properties -Designers Rubbers -Applications -Elastic properties -Designers

TOOLS Saw Drill Spanner Hammer Screwdriver Pilers

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

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

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

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

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

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

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