20
CONSOLIDATION
39.
In your notebook, label
the parts of the tree trunk.
Which parts would you use
to make the following
objects: a shelf, a box for
fruit, a table, a picture
frame. Give reasons for your
answers.
40.
Apart from the cellulose
and lignin, wood contains other substances. Name
them and find information about each one and
what they are used for in industry.
41.
Find information about different ways to dry wood
and point out some of the advantages and
disadvantages of each way.
42.
Look up on the Internet different uses of the
following types of wood: holm oak, pine, fir, cherry
and oak. In a word processing program, draw a
table with two columns: one with the names of the
wood and the other with images you have found.
43.
Classify the following types of wood into softwoods
and hardwoods: pine, beech, mahogany, poplar.
Name some of their applications.
44.
Find out about other types of engineered wood
like compressed wood, metallic wood or wood-
plastic composites. Look up information for each
one.
45.
Listen to the following sentences and decide if
they are true (T) or false (F). If it’s false, explain
why.
46.
Look up on the Internet the relative densities of
these types of wood: walnut, holm oak, chestnut,
pine, olive, fir, cherry and oak.
a)
Draw a table with a word processing program with the
types of wood in order of density. Indicate the density in
g/m
3
.
b)
Find information about the acoustic conductivity of
these types of wood. Add a column to the table with the
speed given in m/s at which sound travels through each
type of wood.
47.
The following table shows tools that we use to
work with wood. Copy it in your notebook. Listen
and complete it with the corresponding power
tools.
Tools
Power tools
saw
hand drill
plane
rasp
sandpaper
screwdriver
What is the advantage of power tools over hand
tools?
48.
Look at the photos:
a)
What do these objects have in common?
b)
Find out which power tool was used to shape them and
explain the process.
49.
What joints were used to put together the chair in
the illustration?
50.
Answer the following questions with the
characteristics of wood in mind. Write full
sentences.
a)
Why is wood a good material for covering the walls of a
house?
b)
What kind of wood do we get from deciduous trees?
c)
What is chipboard made of?
d)
What wood is used to make flooring, parquet and
barrels?
e)
What tool can we use to make a hole in wood?
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ADVANCE EDITION
