UNIT 4. WOOD

VOCABULARY

A
Ash:fresno


B
Birch: abedul
Beech: haya
Branch: rama
Bark: corteza
Broadleaf:hoja ancha

C
Chesnut: castaño
Cork: corcho

D
Deciduous tree: arbol de hoja caduca

E
Elm :olmo
Evergreen tree: hoja perenne

F
Fir:abeto

G
Growth rings: anillos de crecimiento

H
Heartwood: duramen (wood that has died)
Hardwood: Madera dura

L
Leaf: hoja
Leaves: hojas

N
Needle: acícula

O
Oak: roble

P
Pine: pino
Poplar: chopo

R
Roots raíces

S
Stem:tallo
Seed: semilla
Steel: acero
Sapwood: albura (living Wood)
Softwood: Madera blanda
Sap: savia

T
Timber: Madera de construcción
Tree: árbol
Trunk: tronco

W
Wood: madera
Wooden: de madera (A wooden chair)
Walnut: nogal

DEFINITION OF WOOD

Wood is a raw vegetal material. It comes from trunks of trees and branches. It is composed of:
- Cellulose fibres.
- Lignin

PROPERTIES OF WOOD

-Physical Properties:
- Hardness
- Density
- Electrical insulator
- Thermal insulator
- Porosity

-Ecological Properties:
- Renewable
- Biodegradable
- Recyclabe
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