PLASTIC 1
TREES
PLASTICS 3
TIMBER CONVERSION
NUMBER OF PLASTICS
100
what is plastic?
Plastics are a group of materials, either synthetic or naturally occurring, that may be shaped when soft and then hardened to retain the given shape.
100
WHAT ARE TREES?
Trees are plant form that occurs in many different orders and family of plants
100
Plastics are classified into ________main categories.
2
100
what is the definition of the term timber conversion?
The process of converting tree into usable size timber
100
Polyethylene Terephthalate
1
200
Plastics are polymers / not polymers
POLYMERS
200
definition of the term Hardwood trees.
Hardwood trees are trees which comes from the deciduous family of tree, they have broad leaves and they shed their leave annually.
200
IS BAKELITE A PLASTIC
no
200
THE TYPE OF CONVERSION METHOD?
through and through sawn
200
Low-Density Polyethylene
4
300
a substance made of many repeating units is called
polymers
300
What is the main function of the root of the tree?
To absorb water and mineral salt from the earth and anchor the tree
300
A group of plastics that cannot be remelted and used to make another product is known as
thermo setting
300
quarter sawn
300
Polystyrene or Styrofoam
6
400
WHICH NUMBER IS PVC plastic?
number 3
400
Softwoods are conifers and normally have needle-like leaves. They generally have lower densities and are often light in colour. Softwoods usually grow quicker than hardwoods and are cheaper, softer and easier to work. TRUE/FALSE
TRUE
400
__________ is a very strong plastic used to make nuts bolts and washers
Nylon
400
There are several Timber conversion methods , which method is the cheapest and easiest?
Through and through sawing
400
Miscellaneous Plastics (polycarbonate, polyctide, acrylic, acrylonitrile butadiene, styrene, fiberglass, and nylon)
7
500
Plastic is made from?
oil
500
What is the definition of the word Timber
Timber comes from trees to be used for construction purposes
500
______________ are plastics that can be remelted and used to make another product
Thermo- plastic
500
Which of the following is not true about quarter sawn
Ages evenly over time
It is an expensive method
The boards are rather narrow
There is no waste of timber
There is no waste of timber
500
Polypropylene
5