1a) Products from Rocks

Question 0

Bio leaching

Answer 0

Using bacteria to separate copper from copper sulfide

Question 1

Phytomining

Answer 1

Growing plants on land with copper
Plants absorb copper compounds and ions/minerals from soil
Plants are harvested and dried
Plants are burned in a furnace to produce ash
Copper collected from ash

Question 2

Stainless steel

Answer 2

Alloy of chromium and nickel
Corrosion resistant
Used for cutlery

Question 3

High carbon steel

Answer 3

Alloy of iron and 1.5% carbon
Hard
Inflexible
Used for blades and bridges

Question 4

Low carbon steel

Answer 4

Alloy of iron and 0.1% carbon
Easily shaped
Used for car bodies

Question 5

Alloys

Answer 5

Mixture of metals
Different sized atoms distort the layers
Make it harder

Question 6

Bronze

Answer 6

Alloy of copper and tin
Harder
For medals and statues

Question 7

Cupronickel

Answer 7

Alloy of copper and nickel
Hard
Corrosion-resistant
Used to make ‘silver’ coins

Question 8

Gold alloys

Answer 8

Harder

For jewellery

Question 9

Aluminium alloys

Answer 9

Stronger, light weight

For aircraft bodies

Question 10

Crude oil

Answer 10

Mixture of hydrocarbons

Not chemically bonded together

Question 11

Alkanes

Answer 11

Hydrocarbons
Fractions from fractional distillation
Single bond
CnH2n+2

Question 12

Cement

Answer 12

Powdered limestone + powdered clay

Question 13

Mortar

Answer 13

Cement + sand + water

Or

Cement + sand + aggregate (water+gravel)

Question 14

Bondings

Answer 14

Ionic - lose/gain electrons,  ions 
Non-metal + metal
Covalent - sharing electrons
Non-metal + non-metal
Metallic - positive metal ions attracted to negative electrons
Metal + metal

Question 15

Limestone cycle

Answer 15

Limestone CaCO3 - add heat (thermal decomposition)
Quick lime CaO - add water
Slaked lime Ca(OH)2 - add water
Lime water Ca(OH)2 (aq) - add carbon