topic 10 - using resources (2. alloys )

Question 1

what are alloys

Answer 1

mixtures of 2 or more metals or a mixture of metal and a non metal

Question 2

why are alloys harder than pure metals

Answer 2

they are made of different elements with sized atoms so they mix and distort the layers making it difficult for them to slide over each other

Question 3

properties and used of low carbon steel

Answer 3

easily shaped

car bodies

Question 4

properties ans uses of high carbon steel

Answer 4

very strong inflexible brittle

blades for cutting tools bridges

Question 5

stainless steel properties and uses

Answer 5

corrosion resistant hard

cutlery containers for corrosive substances

Question 6

what are bronze alloys made of and used for

Answer 6

copper and tin

hard so used for statues, decorative objects and medals

Question 7

what are brass alloys made of and used for

Answer 7

copper and zinc

malleable and is ideal in applications which require moving parts with low friction

Question 8

what are gold alloys used for and made of

Answer 8

make jewellery

zinc copper ad silver

Question 9

pure gold has how many carat

Answer 9

24

Question 10

uses of aluminium alloys

Answer 10

property in aircraft manufacture