9
3. Wood and its derivatives
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Understand
17.
Listen to the five sentences and decided if they are true (T) or false
(F). Correct the false ones.
18.
Why does wood offer more resistance when you cut it against the
grain rather than with the grain?
Apply
19.
Say which properties of wood are most relevant for the design of the
final task.
4.
PROPERTIES OF WOOD
The uses of wood are related to their properties.
Properties
Soft
Hard Engineered
Density
Heavy
Average
X
X
X
Light
Resistance and
toughness
Very resistant
X
Needs protection
X
X
X
Waterproof
Waterproof
Not waterproof
X
X
X
Colours
Great variety
X
X
Little variety
X
Electrical
conductivity
Conductor
Insulator
X
X
X
Thermal
conductivity
Conductor
Insulator
X
X
X
Acoustic
conductivity
Conductor
X
X
X
Insulator
Easy to work
with
Requires ability
X
Needs some care
X
X
X
Easy to work with
X
X
Recyclable
Yes
X
X
X
No
Biodegradable
Yes
X
X
X
No
Reusable
Yes
X
X
X
No
Understand
15.
Make a list of its uses.
Cork
is taken from cork oaks.
It is soft, porous, very light,
waterproof, elastic and an
insulator.
Understand
16.
Do you know why wood
floats? What is the lightest
wood?
against the grain
with the grain
❚❚
Wood is a good electrical and
thermal insulator but it is an
acoustic conductor.
❚❚
It is not waterproof and needs
protection.
❚❚
It is resistant, tough and
biodegradable.
Key concepts
ADVANCE EDITION
