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Card 6

Front

What substance is powdered limestone mixed with to make cement?

Back

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Card 7

Front

Ores are mined and may be ______ before metal is extracted and then _____

Back

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Card 8

Front

Iron is converted into steel by mixing iron with which element?

Back

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Card 9

Front

Copper can be extracted from low-grade ores by what two methods?

Back

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Card 10

Front

What is an alloy?

Back

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Card 11

Front

Why is pure iron soft and malleable?

Back

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Card 12

Front

Why are most metals in everyday use e.g. copper and aluminium, mixed with small amounts of other metals?

Back

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Card 13

Front

What is the name of the block of metals in the middle of the periodic table?

Back

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Card 14

Front

Which two chemical elements make up most of the molecules in crude oil?

Back

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Card 15

Front

What is the name of the process by which crude oil is seperated?

Back

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