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1. 
How are stones found in nature?
A.
Sand
B.
Gravel
C.
Large blocks of rock
D.
Fragments or granules
2. 
The most common stones are...
A.
Slate
B.
Granite
C.
Marble
D.
Coal
E.
Clay
F.
Concrete
3. 
Which stone has high density, is cold to the touch, hard, high resistance to environmental conditions?
4. 
Which stone has a wide range of colours?
5. 
What stone is mainly used to cover roofs and for pavements?
6. 
What stone is waterproof due to its hardness, density and compacity?
7. 
What stone is extracted in smooth and flat pieces?
8. 
What stones becomes brilliant when polished?
9. 
What properties characterize the slate?
A.
It's coid to the touch
B.
It's highly dense
C.
It has high resistance to environmental conditions
D.
It's hard and compact
E.
It's used in architecture and in sculpture
10. 
What properties characterize the marble?
A.
It's cold to the touch
B.
It's highly dense
C.
It has high resistance to environmental conditions
D.
It's hard and compact
E.
It's used in architecture and in sculpture
11. 
What properties characterize the plaster?
A.
Very strong and resistant
B.
Made from cement and sand, hardens when mixed with water
C.
Used to make foundations for buildings, bridges, etc.
D.
Processed from crushed gypsum that is dehydrated
E.
It hardens rapidly
F.
It is resistant to pressure and to fire
12. 
What properties characterize the mortar?
A.
It hardens rapidly
B.
Made from cement and sand, hardens when mixed with water
C.
Used to make foundations for buildings, bridges, etc.
D.
Processed from crushed gypsum that is dehydrated
E.
It is resistant to pressure and to fire
13. 
What properties characterize the concrete?
A.
It hardens rapidly
B.
Made from cement and sand, hardens when mixed with water
C.
Used to make foundations for buildings, bridges, etc.
D.
Processed from crushed gypsum that is dehydrated
E.
It is resistant to pressure and to fire
F.
It's a mixture of gravel, sand, water and cement that can be reinforced with steel barrs