ACTIVITIES Nº1.
1.- Which raw material do these materials come from?
a) Glass: sand
b) Steel: iron and carbon
c) Plastic: petrol
d) Porcelain: ceramic and clay
e) Planks: wood
f) Concrete: cement and sand
a) Glass: mirror
b) Steel: structure of a building
c) Plastic: water bottle
d) Porcelain: dish
e) Planks: chair
f) Concrete: cement
3. Complete the sensences:
- " Elastic materials can be stretched. They return to their original shape and size alfter stretching"
- " No elastic materials can also be stretched, but they remain permanently former shape after stretching".
Oil, gum, latex gloves, rubber and balloon
5. Order from greater to lesser hardness the following materials:
diamon >plaster>ceramics>plasticine>talc
6. Name three objects made with permeable materials and another three made with waterproof materials.
Sponge, paper and cardboard
Umbrella, plastic and nylon
7. Classify the following textile materials into natural or syntetic:
Natural: cotton, wool, silk, linen, jute
Syntetic: ployester, polyamide, naylon, viscose, lycra, rayon
a) ceramic: hardness, heat conductivity, heaviness
b) concrete: hardness, toughness, heaviness, strenght
c) fiberglass: ductility, elasticity, heaviness, hardness, fusibility
d) graphithe: hardness, fusibility
e) steel: hardness, heaviness, strenght, ductility, malleability, electric conductivity
9.- What are these made of:
b) ceramic: clay
c) fiberglass: glass
d) grafithe: carbon
e) titanium: mineral
f) nylon: plastic
g) policarbonate: Co2 + epioxidos
h) rubber: gum
i) steel: iron and carbon
j) polyestyrene: plastic
10.- Find out a material with the properties of:
b)ductil+good conductor: copper
c)hard+tough+non rust+alloy: steel
11.- Give an example of a suitable material that may be used to make:
- a) garden tools: stainless steel
- b) most work-shop tools: steel, iron
- c) tough kitchen sink units: stainless steel
- d) wire electrical cables: copper
- e) to protect doctors and dentists from harmful radiation when using X-rays: lead
- f) Panels of Land-Rovers: aluminium
- g) Ornaments: gold, silver
- h) jewllery: diamond
- i) car gears: steel
ACTIVITIES Nº2
1. Look for an image of each sort of manufactured process.
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ACTIVITIES Nº3.
1. Complete the table:
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1. Explain what is meant by the term alloy.
An alloy is a mixture of two or more metals
2. Explain in detail the difference between ferrous and non-ferrous metals.
Ferrous metals contain iron and they are magnetic and non-ferrous metals don't contain iron, they aren't magnetic and they are more important for technology than the ferrous.
3. Define the terms ductile, malleable and corrosion resistant.
DUCTILE: is the ability of deforming a material, usually by streching it along its lenght.
MALLEABLE: is the ability of deforming or shaping a material without breaking it.
CORROSION RESISTANT: a metal can't rush
4. Suggest a use for: mild steel, stainless steel, aluminium, copper, brass and lead.
Mild steel: knife
Stainless steel: spoon
Aluminium: planes
Copper: wires
Brass: instrument
Lead: bullet
1. Look for an image of each sort of manufactured process.
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ACTIVITIES Nº3.
1. Complete the table:
Name and melting point |
Composition
|
Properties and characteristics
|
Principal uses
|
Aluminium
2000°C |
Pure aluminium (an element)
|
Hard, tough, malleable and ductil
|
Kitchen equipment, window frames, general cast components
|
Duralumin
650°C |
Aluminium with 4% copper, 1% manganese and some magnesium
| Light, malleable, ductil and impermeable |
Fasteners
|
Copper
1080°C |
Pure copper (an element)
| Good conductor and ductil | Electric wires |
Zinc
420°C |
Pure zinc (an element)
|
Weak metal, extremely resistant to corrosion, low melting point
| Aerospace and automotive industries |
Brass
900-1000°C |
Alloy of copper + zinc
|
Resistant to corrosion, fairly hard, good conductor of heat and electricity
| Musical instruments and electric industry |
Bronze
830°C | Alloy of copper + tin | Resistant to corrosion, good conductor, heavy and strenght | Statues and oranmentations |
Steel
1535°C | Alloy of iron + carbon | Tough, strong, malleable, hard and good conductor |
Construction structures and automotive
|
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ACTIVITIES Nº4. 1. Make a timeline about a TOOL over the history.
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ACTIVITIES Nº5.
1. Complete the table of the Density of these materials:
- ALUMINIUM: mass=200g; volume=74cm3; density: 2,7 g/cm3
- COPPER: mass=475g; volume= 53,3cm3; density= 8.9 g/cm3
- ZINC: mass= 347,9g; volume=49cm3; density= 7.1 g/cm3
- LEAD: mass= 475g; volume=42cm3; density= 11, 3 g/cm3
- WOOD: mass= 15g ; volumen= 20cm3; density= 0.75 g/cm3
- MARBLE: mass=125g ; volumen= 48cm3;density= 2.6 g/cm3
ACTIVITIES Nº6.
1. Explain what is meant by the term alloy.
An alloy is a mixture of two or more metals
2. Explain in detail the difference between ferrous and non-ferrous metals.
Ferrous metals contain iron and they are magnetic and non-ferrous metals don't contain iron, they aren't magnetic and they are more important for technology than the ferrous.
3. Define the terms ductile, malleable and corrosion resistant.
DUCTILE: is the ability of deforming a material, usually by streching it along its lenght.
MALLEABLE: is the ability of deforming or shaping a material without breaking it.
CORROSION RESISTANT: a metal can't rush
4. Suggest a use for: mild steel, stainless steel, aluminium, copper, brass and lead.
Mild steel: knife
Stainless steel: spoon
Aluminium: planes
Copper: wires
Brass: instrument
Lead: bullet
