Metals

Question 1

What are metals

Answer 1

. Metals are elements which mostly have a solid state

. Come from ore’s under the ground

Question 2

What is an ore

Answer 2

. Is a rock
. Metals come from them
. Can be retrieved by mining

Question 3

Are metals environmentally friendly

Answer 3

. Finite material

. Can be recycled

Question 4

3 most common metals

Answer 4

. Copper
. Steel
. Aluminium

Question 5

What is rust

Answer 5

Chemical reaction between oxygen and material moisture

Question 6

Ferrous metals

Answer 6

. Contain iron
. Low carbon steel (mild)
. High carbon steel (tool)

Question 7

Non ferrous metals

Answer 7

. Don’t contain iron

. Eg Aluminium, copper, zinc, tin

Question 8

Alloy metals

Answer 8

. 2 or more metals mixed together

. Eg brass, stainless steel

Question 9

Properties and common uses of copper

Answer 9

. Electrical and thermal conductors, tough, recyclable, attractive colour
. Water pipes, saucepan base, electric cables

Question 10

Properties and common uses of aluminium

Answer 10

. Low density, high strength, easy to machine, excellent corrosion resistance
. Cans, foils, kitchen utensils, window frames

Question 11

Properties and common uses of zinc

Answer 11

. Fair conductor of electricity, relatively low melting point (for a metal)
. Paints, rubber, cosmetic plastics, inks, soaps, textiles, batteries

Question 12

Properties and common uses of Tin

Answer 12

. Soft , flexible

. Plating steels cans used as food containers

Question 13

Properties and common uses of cast iron (ferrous)

Answer 13

. Hard skin, softer underneath, brittle, corrodes by rusting
. Parts with complex shapes

Question 14

Properties and common uses of mild steel (ferrous)

Answer 14

. Tough, ductile, malleable, good tensile strength, poor resistance to corrosion
. Engineering material

Question 15

Properties and common uses of high carbon steel (ferrous)

Answer 15

. Harder than medium carbon steel, more brittle, when heated becomes harder and tougher
. Cutting tools, ball bearings

Question 16

Properties and common uses of lead (alloy)

Answer 16

. Very soft,p, highly malleable, ductile, relatively poor conductor of electricity
. Ammunition, manufacture of strong batteries

Question 17

Properties and common uses of stainless steel (alloy)

Answer 17

. Hard, tough, wear resistant, corrosion resistant

. Cutlery, kitchen equipment

Question 18

Properties and common uses of brass (alloy)

Answer 18

. Quite hard, good heat and electricity

. Ornaments, cost items e.g water tops