Unit 3 - Key Area 2 (Water)

Question 1

The breakdown of organic waste by microorganisms in the absence of oxygen.

Answer 1

Anaerobic digestion

Question 2

Is gas produced from the breakdown of organic waste by microorganisms in anaerobic conditions.

Answer 2

Biogas

Question 3

Use of microorganisms to breakdown organic waste.

Answer 3

Biological oxidation

Question 4

Waste water that includes water from toilets that needs to be treated extensively before it can be reused.

Answer 4

Blackwater

Question 5

Method to improve water quality involving the addition of a chemical which makes smaller particles sticking together ma king them easier to remove.

Answer 5

Coagulation

Question 6

A sustainable way to manage water resources involving removal of salt from water.

Answer 6

Desalination

Question 7

Method to improve water quality involving killing pathogens. (different in developed and developing countries)

Answer 7

Disinfection

Question 8

A method of water conservation used in agriculture

Answer 8

Drip irrigation

Question 9

Liquid waste or sewage that can be released into waterways.

Answer 9

Effluent

Question 10

Method to improve water quality involving the removal of bacteria, parasites and remaining suspended particles. (different in developed and developing countries)

Answer 10

Filtration

Question 11

Formed when tiny particles stick together.

Answer 11

Floc

Question 12

Method to improve water quality involving making smaller particles stick together as a “floc” to allow them to be removed.

Answer 12

Floculation

Question 13

Waste water produced in homes that can be reused.

Answer 13

Greywater

Question 14

Something that can cause disease.

Answer 14

Pathogen

Question 15

A multi stage process used to improve water quality.

Answer 15

Purification

Question 16

Method to improve water quality involving removing larger pieces of debris from surface water.

Answer 16

Screening

Question 17

Method to improve water quality involving the settling particles as sludge.

Answer 17

Sedimentation

Question 18

The liquid formed when the solids have been removed from sewage after sedimentation.

Answer 18

Sewage liquor

Question 19

The solids removed from the sewage during sedimentation.

Answer 19

Sewage sludge