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1. 
What factors determines the properties of wood?
A.
Type of tree
B.
Grain
C.
Age of tree
D.
Enviroment
E.
Colour
F.
Soil
2. 
An important factor is the ________ of the tree. Old trees have different properties from young trees.
A.
Age
B.
Soil
C.
Composition of wood
D.
Hardness
3. 
If the area where the tree is located affect its properties, this factor is ...
A.
The age of the tree
B.
The environment
C.
The grain
D.
The colour
4. 
If wood floats on water, wood is...
A.
denser than water
B.
less dense than water
C.
as dense as water
5. 
If wood resists forces such as compression, traction or bending, we can say it is...
A.
Denser
B.
Hard
C.
Tough
D.
A good mechanical resistor