Across
- 3. This is part of the finishing process. This technique produces a shine, using a polishing wheel with revolving, abrasive wheels or strips.
- 5. A metal that is taken from the mineral bauxite
- 7. This heavy metal is bluish grey, fragile, not very hard, and is used in roofing, plumbing and the car industry. A layer of this metal helps stop corrosion.
- 10. The concentration of carbon in this ferrousmetal is the lowest
- 11. A light metal that is used in medical prostheses. It's silvery white and shiny.
- 13. This tool is used to mark points on sheets of metal
- 14. The group of industries that mine and transform metallic minerals
- 17. This is a small metal, triangular blade with sharp edges. It's used to shave small fragments.
- 19. This is part of the finishing process. The technique is used to protect the metal. The metal is coated in plastic or other metals.
- 20. This is an alloy that has less concentration of carbon than cast iron
- 22. a property of metals that describes how electricity can pass through them easily
- 25. This tool is used to cut soft, flexible, thin sheets of metal. It can cut in straight, angled or curved lines.
- 26. Substances from minerals which contain one or more metallic elements, and sometimes non-metallic substances like carbon
- 28. These techniques are used to change the shape of the piece of metal by applying an external force. It can be done when the metal is hot or at room temperature.
- 29. Metals that contain iron (pure iron, steel and cast iron)
- 31. cooling a metal very slowly
Down
- 1. a by-product that is created during the steel-making process
- 2. The metal piece is shaped by repeated and continuous compression forces using hammers, tongs and anvils
- 4. This is a cold forging process: a sheet of metal is hit with a punch to make the required shape in a mould.
- 5. There are different types; waterproof and instant glues, etc. They help two surfaces stick to each other.
- 6. cooling a metal very quickly when it is red hot
- 8. This ferrous metal has the highest level of carbon out of the three types of ferrous metals
- 9. This tool is used to make holes with drill bits.
- 12. Drawing A wire is pulled through a hole that has the required dimensions. A rotating drum is used to pull it through the hole to increase its length and decrease its diameter.
- 14. An ultra-light metal (non-ferrous metal)that is shiny, silvery white, soft and malleable and reacts very strongly with oxygen. It's not very ductile. Fireworks use this metal.
- 15. the important and useful part of a mineral
- 16. It's an alloy of copper and tin. It's also considered a heavy metal. It's resistant to wear and corrosion. It can be used in boat propellers, church bells and sculptures.
- 18. The unprocessed metal is passed through a series of rollers that compress it, reduce its thickness and increase its length. It's usually done when the metal is hot.
- 21. Molten metal is poured into a container with a hollow space inside, which is the shape of the object we want to make. The mould can be made from sand, steel or cast iron.
- 23. This power tool is used to shape cylindrical objects. It works by turning the object while a blade moves along the length of the object removing the metal.
- 24. This joins one piece to another where there is a threaded hole.
- 27. A heavy metal that is reddish and very shiny. It's soft and a good electrical and thermal conductor. It's used in electrical wiring, pipes, telephone lines, etc.
- 30. We use a tin-lead alloy. This is heated with an electric soldering iron, which reaches temperatures of 400 degrees Celcius.