DAY 5 – Answers
Metals and their Extraction
KEY
Mineral  Ore  Reactivity Series  Extraction  Native  Reduction 
WORDS
Smelting  Electrolysis  Displacement  Phytomining  Bioleaching 
Question
1
Answer:
2
Answer:
The metal compounds that go to make up rocks are called…
Minerals
What are ores?
Minerals that contain enough metal element to make them economic to
extract the metal
3
Answer:
4
Answer:
5
Answer:
6
Answer:
7
Answer:
8
Answer:
What is meant by the term ‘native metal’?
Metals that are found in their pure state (not as compounds)
Name two metals that can be extracted by reduction with carbon
Copper, Lead, Tin, Iron, Zinc
What happens in a reduction reaction?
The oxygen is removed from the compound
What method is used to extract metals above zinc from their ores?
Electrolysis
Explain what happens to the positive metal ions during electrolysis
Move to the negative electrode
What is phytomining and bioleaching?
Phytomining – plants used to absorb and concentrate metal (then ashed)
Bioleaching – bacteria convert solid metal to a dissolved solution (leachate)
9
Answer:
Give 2 reasons for using phytomining and bioleaching
Low grade ores can become economic
Less pollution or more environmentally friendly
10
Answer:
Give 3 reasons why copper is such a useful metal?
Good conductor of heat or electricity
Soft and malleable
Unreactive and not poisonous
DAY 6
Metals and their Uses
KEY
Blast furnace  Cast iron  Steel  Alloys  Properties 
WORDS
Transition metals  Titanium  Aluminium  Recycled 
Question
1
Name the compound of iron that is reduced in the blast furnace
Answer:
2
Why is cast iron only useful as a metal for some purposes?
Answer:
3
Why is steel a better product than pure iron?
Answer:
4
Steel is an alloy of iron. Draw a picture of the metal atoms in an alloy.
Answer:
5
List 4 properties of a metal that can be changed by alloying
Answer:
6
Why are alloys classed as mixtures rather than compounds?
Answer:
7
Why are some alloys ‘SMART’
Answer:
8
What properties make aluminium a useful metal?
Answer:
9
Why is titanium useful for jet engines and replacement hip joints
Answer:
10
Answer:
Give 2 reasons why metals should be recycled wherever possible