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Card 16
Front
Limestone is mostly made up of what?
Back
Card 17
Front
Water is one of the ingredients of concrete. What are the other ingredients?
Back
Card 18
Front
What is an advantage of using concrete to make building foundations?
Back
Card 19
Front
What is a benefit of a limestone quarry?
Back
Card 20
Front
Why can gold be found in the Earth's crust in its native state?
Back
Card 21
Front
Why is aluminium extracted from its ore by electrolysis?
Back
Card 22
Front
Why is iron extracted from its ore by reduction with carbon or carbon monoxide?
Back
Card 23
Front
What happens to iron oxide in a blast furnace?
Back
Card 24
Front
What is the percentage of iron in the iron from a blast furnace?
Back
Card 25
Front
What process is used to purify copper?
Back
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