Technology 3 ESO – Unit 4 CONSTRUCTION MATERIALS extra activities
1 – Name three types of stone.
2 – Which of these ingredients are ingredients of “Portland cement”?
a) Clay b) wood c) wool d) gypsum e) plastic f) metal oxides
3 – Why do we dip the bricks in water before laying them with mortar?
4 – What material would you use to:
- a) Make the foundation of a road.
- b) Cover a brick wall (inside a house).
- c) Make a brick.
5 – True or false?
- a) Concrete is good for making columns.
- b) We extract stone from quarries.
- c) There are two different types of cement.
- d) Mortar is a mixture of cement, sand and water.
- e) Reinforced concrete is concrete with wood bars inside it.
- f) Plaster is a good sound insulator.
- g) Ceramic is made from concrete.
- h) Firing is the third step to manufacture ceramics.
6 – Watch the video on “Cement production” and answer:
- a) What is the main component of concrete?
- b) What is the raw material used for cement production?
- c) Why do we add small amounts of silicium, aluminium and iron?
- d) What happens in the “cyclone Tower”?
- e) What is “sintering”?
- f) Why do we add 3 to 5 % gypsum in the final stage?
7 – Watch the video on “Mortar: Definition and Types” and answer:
- a) What is “mortar”?
- b) What types of “mortar” there are?
