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1º ESO - WOOD

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by

Moisés Llorente Santos

on 22 January 2015

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Transcript of 1º ESO - WOOD

UNIT 4: WOOD AND ITS DERIVATIVES (Pages 55 to 64)
Wood doesn't seem to be a technological material, but... why is wood important in technology/industry?
H__DN_S_

_EN_I_Y

E_E_TR__AL I_S_LA_I__

_HE_M__ _N_U__T_ON

P_R_SI_Y

ME__A__C_L RE_I_TA_C_

CO_OU_ AND G_AI_
WOOD is a
raw vegetable material
, obtained from the trunks of trees and bushes and composed of
cellulose

fibres
and
lignin
.
What's the meaning of these rings?
WOOD PROPERTIES
Physical properties:
WOOD PROPERTIES
Ecological properties:
Wood is RENEWABLE.
Wood is BIODEGRADABLE.
Wood is RECYCLABLE.
How to recycle an old wood pallet into a modern living-room's table...
Think and draw in your book 3 diferent and useful objects you could build by means of the recycling of the following wood objects:
old wood bench
wood storage chest
WOOD PROCESSING (page 56)
These are the six stages of the wood processing, but... is this the correct order?
REMOVING THE BARK
SAWING
PLANING
CUTTING AND PRUNING
DRYING
TRANSPORT
WOOD PROCESSING
1.

CUTTING
(the trees)
AND PRUNING
(the branches).
2.

TRANSPORT
the logs by road, water or rail.
3.

REMOVING THE BARK
at the sawmill.
4.

SAWING
the logs into planks.
5.

DRYING
to avoid the warping.
6.

PLANING
, to make the wood smooth and flat.
WORKSHOP ACTIVITY
For the next three classes, at the workshop, you will have to put your creativity to work.

I'll give you some pieces of old wood and you, working in groups, will have to build a new object with the following features:

-
Useful
(it must have one utility at least)
-
Nice
(take care of the smallest details to get a nice object).
-
Original
(don't copy any well known design)
WOOD WARPING MODES
CLASSIFYING WOOD (page 57)
1. HARDWOOD:
- Come from deciduous trees.
- Thick trunks and grow slowly.
- Compact and resistant.
- Trees:






- Uses: furniture, doors, musical instruments, etc.
beech
oak
mahogany
mahogany desk
oak table
beech guitar
CLASSIFYING WOOD (page 57)
2. SOFTWOOD:
- Come from conifers (needle-shaped leaves).
- They grow quickly.
- Light and easy to work with.
- Trees:







- Uses: furniture, boats, buildings.
pine
fir
pine trunk
pine wood house
fir wood boat
WOOD DERIVATIVES (page 58)
Plywood:
thin sheets of wood glued and compressed.
Chipboard:
Made with wood
chips glued and compressed.
Advantages:

- Easy to work with.
- Not attacked by parasites.
- Helps protect the environment.
- Cheaper.
TRUE OR FALSE?
1. Wood is more dense than water, so it doesn't float __

2. Wood has good mechanical resistance __

3. A Sawmill is a place where you can prun a tree__

4. A crook shaped wood is a curved piece of wood__

5. Hardwood come from deciduous trees__

6. A fibreboard is a type of softwood__
PLYWOOD MANUFACTURING PROCESS
(Fruit packaging)
RECYCLED OBJECT LAUNCHING
Are you proud of the final result? Why?

Is the object useful? How could you use it?

Did you consider to build other different objects? Why didn't you do it?

Evaluate yor own creation (mark from 0 to 10)

You have 30 seconds to convince the class that your creation is the better one.


BOOK ACTIVITIES:

- Page 59, activities 1, 3, 4 and 7.
Full transcript