UNIT 4 - UNIT 4 - MATERIALSMATERIALS

METALSMETALS

INTRODUCTORY ACTIVITYINTRODUCTORY ACTIVITYLIST TEN METALLIC LIST TEN METALLIC OBJECTSOBJECTS

METALS PHYSICAL METALS PHYSICAL PROPERTIESPROPERTIES

Metals have shiness, they have Metals have shiness, they have LUSTERLUSTER..Metals are good Metals are good CONDUCTORSCONDUCTORS of of HEATHEAT and and ELECTRICITYELECTRICITY..

Metals are Metals are SOLIDSOLID, except mercury that is liquid., except mercury that is liquid.Metals can be shaped into sheets, it means that Metals can be shaped into sheets, it means that

they are they are MALLEABLE.MALLEABLE.Metals can be shaped into wires, it means that Metals can be shaped into wires, it means that

they are they are DULTILE.DULTILE.Metals are resistant to scratching, they are Metals are resistant to scratching, they are HARDHARD..

Metals return to their original shape, it means Metals return to their original shape, it means that thet are that thet are ELASTICELASTIC..

CHEMICAL PROPERTIESCHEMICAL PROPERTIES► Metals form Metals form CATIONSCATIONS, positive , positive

particles.particles.► Metals Metals OXIDIZEOXIDIZE easily, so it is said easily, so it is said

that they that they RUSTRUST. .

Where can we find metals?Where can we find metals?► We can find We can find NATIVENATIVE metals like metals like COPPERCOPPER, , SILVERSILVER, or , or GOLDGOLD..

► We can also find metals in We can also find metals in ORESORES inside the Earth.inside the Earth.

►The process used to obtain metals The process used to obtain metals from its ores is called from its ores is called REFININGREFINING..

What is the most important What is the most important metal?metal?

►IRONIRON is the most important metal. is the most important metal.

What is the most important iron What is the most important iron ALLOYALLOY??STEELSTEEL is the most important iron alloy. is the most important iron alloy.

IRON PRODUCTIONIRON PRODUCTION

QUESTIONS ABOUT IRON PRODUCTIONQUESTIONS ABOUT IRON PRODUCTION1.1. List the List the raw materialsraw materials used in iron used in iron

production.production.

2.2. Where is iron produced?Where is iron produced?

3.3. Write the range of temperature used Write the range of temperature used in the blast furnace.in the blast furnace.

4.4. How high are some furnaces?How high are some furnaces?

5.5. How much iron can a furnace How much iron can a furnace produce per day?produce per day?

6.6. List the products obtained from the List the products obtained from the blast furnace.blast furnace.

7.7. Name the most important elements Name the most important elements added used to obtain steel from iron.added used to obtain steel from iron.

How are metallic material classified into?How are metallic material classified into?

Metallic materials are classified into…Metallic materials are classified into…What are ferrous metals made of?What are ferrous metals made of?Ferrous metals are made of ….Ferrous metals are made of ….How can be ferrous metals identified?How can be ferrous metals identified?They can be identified ……They can be identified ……What is the characteristic of non-ferrous What is the characteristic of non-ferrous metal?metal?The characteristic of non ferrous metals is that The characteristic of non ferrous metals is that they….they….List five examples of non-ferrous metals.List five examples of non-ferrous metals.

ListList eight common pure metals.eight common pure metals.What is an alloy?What is an alloy?

An alloy is …An alloy is …

FERROUS METALS

NAME ALLOY OF IRON AND….

PROPERTIES USES

Mild steel(acero

templado)

Up to 0,6% of Carbon (C)

Tough (tenaz)It rusts easily.

Common in workshops.

Carbon steel(acero al carbono)

Up to 1,6% C Tough (tenaz = resistente a los

golpes)

Cutting tools

Stainless steel

Nickel and chromium

Resistant to rust.Tough.

Home, buildings,

knives

Cast iron(fundición)

Up to 6% of C Strong but brittle (quebradizo)

Engines

NON FERROUS METALSNAME COLOUR PROPERTIES USES

ALUMINIUM Whitish grey Light, soft, ductile,

malleable, easy to work

COPPER (cobre)

Redish brown corrosion resistant, ductile,

malleableSILVER (plata)

Whitish grey Ductil, malleable,

resists corrosion

LEAD (plomo)

Bluish grey Heavy, ductile, malleable.

TIN (estaño)

Bluish grey Soft, it does not rust

List 4 objects made of steelList 4 objects made of steel