Industrial Techniques

1. a device that converts chemical energy to electrical energy.
3. this device consists of several blades which are driven by falling water, steam or by the wind.
6. companies supplying electrical energy measure this energy in a unit called_____.
7. this is the most commonly used method for seasoning.
10. is the name given to sand/glass paper and emery paper.
11. metals which contain iron and rust easily.
18. metals which contain little or no iron.
20. is produced by using water to turn a turbine to produce electricity.
22. are tiny living things that cannot be seen with the naked eye.
25. are a group of plastics that can be remelted after being form.
32. can be used as mulch around plants.
33. are a group of plastics that cannot be remelted after being form.
36. a device which converts mechanical energy to electrical energy.
37. to produce light we used a device called a ___.
38. is a process by which melted plastic is formed into useful products.

1. this type of raw material produces aluminum.
2. these are made from wood that are used for indoor purposes.
4. is energy at rest.
5. the term used for the sawing of logs into timber is_____.
7. is energy at work.
8. is a type of non-ferrous metal.
9. a dividing layer that makes new cells to help the tree grow.
12. are the materials from which metals are processed.
13. the youngest wood that is nearest to the outside of the tree trunk.
14. comes from trees producing broad leaves.
15. is a synthetic material made from substances called polymers.
16. involves the movement of small particles called charges.
17. is the process of using waste materials to produce articles.
19. is the ability to do work.
21. this part of the tree absorbs sunlight and carbon dioxide from the atmosphere.
23. is a solid, burnable substance that is black to brown in colour.
24. comes from trees producing needles-like leaves.
26. is a thick, dark liquid trapped between rock or sand under the Earth.
27. when two or more metals combined to form one it is called an___.
28. used to test squareness of a metal.
29. the process of removing moist from timber is referred to as______.
30. this is a type of defect that is found in timber.
31. is the opposition to the flow of current.
34. used to scribe or mark lines on metal.
35. is a popular natural material used for constructing articles.