Core Materials-metal

Question 1

Metal found where

Answer 1

Majority in ores (a rock which contains valuable mineral-metal)

Question 2

How is silver and gold found

Answer 2

In its pure form . Gold found in small quantities but no commercially viable

Question 3

Ferrous metal

Answer 3

Magnetic because they contain iron,cheap and abundant ,prone to rust ,%carbon

Question 4

Non ferrous metal

Answer 4

Pure metals , Mon magnetic ,expensive,aesthetic

Question 5

Alloy

Answer 5

A mixture of two or more metals to improve the properties mechanically and physically

Question 6

Ferrous metal examples

Answer 6

Mild steel,cast iron,high carbon steel

Question 7

Non ferrous metal examples

Answer 7

Aluminium, copper,tin,zinc

Question 8

Alloy examples

Answer 8

Brass,stainless steel,

Question 9

Physical and working properties-mild steel

Answer 9

Grey and smooth,rusts if not protected

Ductile and tough,used for construction,nuts,bolts

Question 10

Physical and working properties-cast iron

Answer 10

Dull grey,rusts easily

Brittle if things,used for manhole covers ,pans and gates

Question 11

Physical and working properties-high carbon steel

Answer 11

Grey,smooth,doesn’t rust

Hard-wearing ,less ductile but used to make tools

Question 12

Physical and working properties-aluminium

Answer 12

Light grey with matt finish

Lightweight,strong and ductile,used for drink cans ,kitchen utensils

Question 13

Physical and working properties-copper

Answer 13

Rose coloured ,polishes well but oxidise to green,

Good electrical conductors, can be polished, used for plumbing parts and elciap cables

Question 14

Physical and working properties-tin

Answer 14

Silver coloured

Soft and malleable, easy to form ,used to make food cans

Question 15

Physical and working properties-Zinc

Answer 15

Silvery blue with matt finish

Brittle,average materiality,galvanise steel

Question 16

Physical and working properties-brass

Answer 16

Non ferrous metal,gold colour and darkens with ge

Alloy of copper and zinc ,used for musical instruments,

Question 17

Physical and working properties-Stainless steel

Answer 17

Ferrous,silver when polished,resists rust

Slow of chromium,nickel and manganese,used for cutlery and sinks²

Question 18

Galvanising

Answer 18

A coating of molten zinc is applied to steel or iron for protection and resistance for rusts

Nuts/bolts/structural beams/bridges

Question 19

Plastic coating

Answer 19

Application of liquid polymers of plastic to a workpiece for corrosion resistance ,electrical insulation

Tool handles/car parts

Question 20

Spray painting

Answer 20

A painting technique to spray coating material onto a surface for aesthetics, ability to cover surface easily

All surfaces

Question 21

Electroplating

Answer 21

coating a metal through reduction of cat ions for corrosion resistance, heat resistant

Jewlry,kitchen ware, mobile phones