C15- Using Our Resources

Question 1

Corrosion

Answer 1

When a metal is destroyed by chemical reactions with other substances in the environment.

Question 2

Alloy

Answer 2

A mixture of two or more metal elements - usually harder or stronger than the elements on their own

Question 3

Composite

Answer 3

Consists of two or more materials with different properties. They are combined to produce a material with improved properties.

Question 4

Ceramic

Answer 4

Made from wet clay which is shaped and then heated in a furnace

Question 5

Polymer

Answer 5

Made from many monomers joined together to form a long chain

Question 6

Thermosoftening

Answer 6

Polymer that melts when heated

Question 7

Thermosetting

Answer 7

Polymer that does not melt when heated. These will char or burn instead due to the strong crosslinks

Question 8

Haber Process

Answer 8

Process used for the manufacture of ammonia

Question 9

Ammonia

Answer 9

Compound formed from nitrogen and hydrogen with the formula NH3

Question 10

Electroplating

Answer 10

Using electrolysis to coat a very thin layer of metal over another less expensive metal

Question 11

Sacrificial protection

Answer 11

Process where a more reactive metal is used to protect another metal. The more reactive metal will be used up

Question 12

Galvanising

Answer 12

Coating a metal with zinc in order to protect it.

Question 13

3 physical barriers to stop corrosion

Answer 13

Paint
Coat with plastic
Oil or grease

Question 14

Soda-lime glass

Answer 14

Soda-lime glass is made by melting a mixture of sand (silicon dioxide), limestone and sodium carbonate

Question 15

Uses of Soda-lime glass

Answer 15

Window panes, glass jars and bottles

Question 16

Borosilicate glass

Answer 16

Contains boron trioxide. It has a higher melting point than soda-lime glass

Question 17

What do properties of polymers depend on?

Answer 17

The monomer they are made from
The conditions when they are made

Question 18

Properties of Thermosoftening polymers

Answer 18

Tangled polymer chains
No cross-links between chains
Weak forces of attraction between chains
Softens when heated

Question 19

Properties of thermosetting polymers

Answer 19

Polymer chains held together by strong covalent cross-link that does not break on heating.
Remains hard when heated

Question 20

Components of composites

Answer 20

Reinforcement (fibres or particles)
Matrix

Question 21

Bronze alloy component metals

Answer 21

Copper and tin

Question 22

Bronze alloy uses

Answer 22

Bells
Coins
Statues

Question 23

Brass component metals

Answer 23

Copper and Zinc

Question 24

Brass alloy uses

Answer 24

Locks
Taps
Instruments
Door hinges
Door knobs

Question 25

Gold alloy component metals

Answer 25

Alloyed with other metals such as silver, zinc and copper.

Question 26

Gold alloy uses

Answer 26

Jewellery

Question 27

High carbon steel component metals

Answer 27

Iron and a high amount of carbon

Question 28

Uses of high carbon steel alloy

Answer 28

Construction industry (hard and brittle)

Question 29

Low carbon steel component metals

Answer 29

Iron and a small amount of carbon

Question 30

Uses of Low carbon steel alloy

Answer 30

Car body panels (soft and easily shaped)

Question 31

Stainless steel component metals

Answer 31

Iron, chromium and nickel

Question 32

Stainless steel alloy uses

Answer 32

Cutlery (hard and does not corrode)