Timber

Timber

1. How do trees benefit us?

   • Make oxygen
   • Roots protect the soil from being eroded by wind and rain
   • Control the climate – e.g global warming, they help the carbon dioxide from the atmosphere
   • They beautify our environment
   • They are a source of food (such as fruit and nuts) for people and animals
   • They provide a wide range of timber products that we use in our homes, offices and factories

2. What are the two groups of trees

   • Hardwood
     • pored wood
   • Softwood
     • non-pored wood

3. Properties

   • Colour
   • Grain
   • Figure
   • Hardness
   • Strength
   • Toughness
   • Durability

4. Finishing types for timber

   • planed
   • dressed

5. Main timber products

   • sawn timbers
   • veneers and plywoods
   • particle board and fibreboard
   • round timbers
   • wood pulp

6. Veneer and plywood

   • logs are made by peeling and slicing

7. particle board and fibreboard

   • logs are cut and chipped from the wasted parts of the trees