Timber

Timber

How do trees benefit us?
1. Make oxygen
2. Roots protect the soil from being eroded by wind and rain
3. Control the climate – e.g global warming, they help the carbon dioxide from the atmosphere
4. They beautify our environment
5. They are a source of food (such as fruit and nuts) for people and animals
6. They provide a wide range of timber products that we use in our homes, offices and factories
What are the two groups of trees
1. Hardwood
  1. pored wood
2. Softwood
  1. non-pored wood
Properties
1. Colour
2. Grain
3. Figure
4. Hardness
5. Strength
6. Toughness
7. Durability
Finishing types for timber
1. planed
2. dressed
Main timber products
1. sawn timbers
2. veneers and plywoods
3. particle board and fibreboard
4. round timbers
5. wood pulp
Veneer and plywood
1. logs are made by peeling and slicing
particle board and fibreboard
1. logs are cut and chipped from the wasted parts of the trees

Zusammenfassung der Ressource

	Erstellt von ClareArmstrong vor etwa 11 Jahre