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WorksheetsMetals - An Introduction (KS 3)
Total questions: 22
Worksheet time: 16mins
Shared metal characteristics;
malleable
insulators
Shiny when first cut
brittle
The relative cost of a metal is determined by;
How expensive the items are that it is made into
Its abundance (how much there is of it close to the surface of the Earth)
How easily it can be recycled
How easily it can be extracted and processed
Ferrous metals;
are prone to rusting
Are relatively expensive
Are attracted to a magnet
Are made by adding together metals
Are made from iron and carbon
Non-ferrous metals;
are prone to rusting
Are relatively expensive
Oxidise in air.
Are made by adding together metals
Make up a huge percentage of the elements.
Alloys;
Occur naturally
Can be engineered to have new and more useful properties
Are made by combining 2 or more metals together
Are relatively expensive to produce
Metals found on the Periodic Table;
Brass
Tin
Solder
Copper
Iron
The order in which steel and copper are processed;
Crushing of ore, smelting, use of blast furnace, smelting
Mining, use of blast furnace, crushing of ore, smelting
Mining, smelting, crushing of ore, use of blast furnace
Mining, crushing of ore, use of blast furnace, smelting
Order of processing aluminium
Mining, electrolysis, crushing of ore, purifying bauxite into alumina,
Electrolysis, mining, crushing of ore, purifying bauxite into alumina.
Mining, crushing of ore, purifying bauxite into alumina, electrolysis.
Mining, purifying bauxite into alumina, crushing of ore, electrolysis.
Metals can be argued as 'environmentally friendly' because;
of the amount of energy needed to process, transport and manufacture them
Their ability to be recycled
Their expected life-expectancy
the way in which they are extracted from the Earth's crust
the length of time they remain in the environment after disposal
Metals need to be separated carefully before recycling because;
metals can react with each other dangerously
mixing metals speed up the process of oxidisation
only certain metals can be recycled
impurities them will affect the metal's properties
Stock forms;
Are more expensive
Allow consumers to 'shop around'
Enable designers to keep the cost of products down
Enable manufactures to specialize, keeping costs down
Can create problems with handling and transportation
Stock forms of metals include;
Planks
Rod
Granules
Sheet
Beam
Metals can be argued as 'environmentally unfriendly' because;
of the amount of energy needed to process, transport and manufacture them
Their ability to be recycled
Their expected life-expectancy
the way in which they are extracted from the Earth's crust
the length of time they remain in the environment after disposal
Deburring metals;
Improve safety
Improve the way metal products feel
Improve the way metals look
Reduce the cost of metal products
oxidisation
is a reaction between a metal and oxygen
reduces the strength of the metal
is unattractive
is problematic with regard specifically to iron-based products
Surface finishes are applied to materials...
To make them cheaper to produce.
To improve a materials aesthetics.
To improve a materials functionality.
To improve the material's ability to be recycled.
Galvanising;
reduces the cost of the product
is a surface finish commonly applied to steel-based external products
Involves the use of zinc
is used to protect the metal beneath
Garden ladders are often made from aluminium because..
it is strong
it is lightweight
it is hard
it does not rust
it is a good electrical conductor
Surface finishes that are commonly used to prevent steel from rusting;
polishing
dip coating
oil bluing
galvanising
painting
Kitchen sinks are often made from stainless steel because...
it is lightweight
it is hard
it is a good electrical conductor
it is tough
it does not rust
Wiring is made from copper because...
it is strong
it is malleable
it is an excellent thermal conductor
it is hard
it is ductile
