Using resources

Question 1

Which method of extracting copper is used for low grade ores?

Answer 1

Bioleaching

Question 2

Recycling process for metals (2 marks)

Answer 2

Melt
Reshape

Question 3

What is the process of making ground water into potable water?

Answer 3

Filtering
Sterilising

Question 4

What is the process of making sewage water potable?

Answer 4

Screening + grit removal
Sedimentation - splitting into effluent and sewage sludge
Aerobic biological treatment of the effluent
Sterilising it
Sludge digested anaerobically

Question 5

What are the disadvantages of plastic burning?

Answer 5

Produces toxic fumes

Question 6

What are the disadvantages of plastic production?

Answer 6

Produce oxides that are toxic

Question 7

Broad disadvantage of plastic?

Answer 7

It uses landfill space