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Products from rocks
Slaked lime is a common name for which one of the following?
How do you produce calcium oxide from calcium carbonate?
By heating it
By adding water to it
By neutralising excess acidity
Limestone is mostly made of what?
Water is one of the ingredients of concrete. What are the other ingredients?
Clay, sand and crushed rock
Soda, sand and crushed rock
Cement, sand and crushed rock
What is an advantage of using concrete to make building foundations?
It is strong when stretched.
It is strong when squashed.
It is worn away by acid rain.
What is a benefit of a limestone quarry?
There is a lot of dust and noise.
There is employment for local people.
It causes acid rain.
Which of the following is a disadvantage of using glass for windows?
It is transparent.
It is tough and difficult to break.
It can trap too much heat in a building in the summer.