metals and their uses

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where are metals usually found?
the earth's crust
1 of 18
what is an ore?
a naturally occurring metal which is valuble
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how are unreactive metals found in the earth?
as a metal
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how do you turn iron oxide into iron?
it is reduced by a blast furnace
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why is iron from the blast furnace not very useful?
it is too brittle
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which alloy is iron mostly converted into?
steel
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what does steel contain?
controlled elements of carbon and other elements
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which two metals resist corrosion and low densities compared to other metals?
aluminium and titanium
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which two metals cannot be extracted from their oxides using carbon?
aluminum and titanium
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which two metals are very expensive because extracting them involves many stages and requires large amounts of energy?
aluminium and titanium
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how is most copper extracted from copper rich ores?
smelting
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how can copper be purified?
eletrolysis
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what are two new ways to extract copper from its low grade ores?
bioleaching and phytomining
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which metal can be obtained from solutions of their salts by displacement or electrolysis?
copper
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which metals are found in the centre block of the periodic table?
transition metals
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which group of metals have good properties that make them useful for building and making things?
transition metals
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what three issues are associated with exploded metal ores?
social, economical and enviromental
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what saves energy and limited resources?
recycling
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Other cards in this set

Card 2

Front

what is an ore?

Back

a naturally occurring metal which is valuble

Card 3

Front

how are unreactive metals found in the earth?

Back

Preview of the front of card 3

Card 4

Front

how do you turn iron oxide into iron?

Back

Preview of the front of card 4

Card 5

Front

why is iron from the blast furnace not very useful?

Back

Preview of the front of card 5
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