XI. Match the words with their definitions.

A B

1. adhesive a) to improve smth or to make it more attractive

or more valuable;

2. cellulose b) the process of combining a substance with

oxygen;

3. hemicellulose c) material used to give color to wood;

4. lignin d) the carbohydrate that is the principal

constituent of wood and forms the framework

of the wood cell;

5. enhance e) a substance which can hold materials together

by surface attachment. It is a general term

and includes cements, paste, glue, etc.

6. stain f) the component of wood, located mainly between wood

cells, which is the thin cementing layer between wood

cells;

7. varnish g) a celluloselike material (in wood) that is easily

divided by acid, and transformed into

several different simple sugars;

8. fasten h) a clear sticky liquid used for covering wood

or other surfaces. It forms a shiny clear

surface that gives protection;

9. oxidation i) to fix one thing to another using smth such as

nails, screws, dowels, adhesives, etc.

XII. One word in each line is odd. Cross this word out, and say why you have

done it.

1. Glue, paste, stain, cement.

2. Adhesive, nail, varnish, dowel.

3. Cellulose, stain, lignin, hemicellulose.

4. Fire, oxidation, acid, saltwater.

5. Stain, varnish, lacquer, tool.

XIII. Decide if the following statements are true or false. Correct the wrong

sentences.

1. Wood is of great importance for our economy due to its specific

characteristics.

2. Cellulose is the secondary component of wood and forms the framework

of the wood cell.

3. To use wood most effectively, physical properties should be considered.

4. Historically, some species were less available and less popular than

others.

5. According to modern research wood properties aren’t affected by

location and growth conditions of wood.

6. Wood is easily fastened with tools, nails, lignin.

7. Wet wood has bad insulating properties against sound and electricity.

8. Varnish is a clear sticky liquid which is used for shaping wood and

which forms a shiny clear surface that gives protection.

9. Wood resists oxidation, fire, and preservatives.