Technology: Woods

1. .......................... properties of materials are those properties related to how a material, wood in this case, reacts to ................................... agents such as..................................., ..................................., ...................................

2. Hardness is a property of a ................................... material which is not easily................................... or ................................... by objects. There are ................................... and ................................... woods. The more quickly a treegrows, the ................................... its wood becomes. The less resin a tree has, the ................................... its wood gets.

3. Density is the relationship between the................................... of an object an its .................................... It is measured in .................................../ .................................... Most wood is................................... dense than water, so, it floats, except wood from trees such as .......................... and ..........................

4. Mechanical resistance: wood withstands......................... efforts well, and ......................... efforts badly. It also has a good performance against ...................... efforts, whenever young and humid.

5. Wood is a good...................................... and ...................................... insulator, it means that it doesn't conduct ...................................... nor.......................................

6. Wood can ............................. or ........................ liquids and gases because it has ................................. ................................. called pores. Wood isa .............................material. If a material is more porous then it is less .......................

7. Wood is a biodegradable material, that is to say it ...............................