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Construction materials
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- 1Where are the metals iron and aluminium extracted from?They are extracted from rocks called ores.
- 2What is clay, and what can it make?Clay is a rock that makes brick when it is baked.
- 3What is glass made from?It is made from sand, which is small grains of rock.
- 4Give examples of rocks that just need to be shaped to be ready to use as a building material.Limestone.
Marble.
Granite. - 5What are aggregates and what are they used for?Aggregates (crushed rock or gravel) are used in road making and in building.
- 6Which is the softest rock and which is the hardest rock from limestone, granite and marble?Limestone - softest.
Marble.
Granite - hardest. - 7Where is rock dug from?It is dug out of the ground in mines and quarries.
- 8Why must mining and quarrying companies take steps to reduce their impact on the local area and environment?Because they can:
Be noisy.
Be dusty.
Take up land.
Change the shape of the landscape.
Increase the local road traffic. - 9What will a responsible mining/quarry company do after leaving the mine/quarry?They will ensure that it reconstructs, covers up and restores any area it has worked on.
- 10What are limestone and marble both forms of?Calcium carbonate (CaCO3)
- 11What happens to calcium carbonate when it is heated and what type of reaction is this?It breaks up into calcium oxide and carbon dioxide.
This reaction is called thermal decomposition. - 12What is thermal decomposition?It is when one material breaks down into two new substances when it is heated.
- 13What is made when clay and limestone are heated together?Cement is made.
- 14What is one of the main uses of cement?One of the main uses of cement is to make concrete.
- 15What do you need to make concrete?1 bag of cement.
5 bags of sand.
5 bags of aggregate.
Water. - 16How do you make concrete?1. Mix all dry ingredients.
2. Add water.
3. Mix well.
4. Allow to set. - 17Is concrete strong?It is very hard but not very strong.
- 18How can concrete be strengthened, and what is this called?By allowing it to set around steel rods to reinforce it, making reinforced concrete.
- 19What material is reinforced concrete?It is a composite material.
- 20What does a composite material combine?It combines the best properties of each material.
- 21What properties does reinforced concrete combine?It combines the strength and flexibility of the steel bars with the hardness and bulk of the concrete. reinforced concrete has many more uses than ordinary concrete.
- 22What type of rock is limestone?It is a sedimentary rock.
- 23What type of rock is marble, and how is it made?It is a metamorphic rock, made from limestone that ahs been put under pressure and heated, which makes it harder.
- 24What type of rock is granite?It is an igneous rock.
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- GCSE (C2) chemistry Fichas sobre Construction materials, creado por Rebecca Smith el 23/01/2017.
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- Rebecca Smith
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