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Question 1

1. What is salt also known as?

Answer 1

Sodium chloride

Question 2

1. What is salt used for?

Answer 2

• for the food industry
• as a source of chemicals
• to treat roads in winter

Question 3

2. Where can salt be obtained from?

Answer 3

• from underground salt deposits

- from the sea

Question 4

2. How can salt be mined from underground salt deposits?

Answer 4

• rock salt mining

- solution mining

Question 5

2. How can salt be mined from the sea?

Answer 5

-Evaporating seawater in hot countries

Question 6

3. What is the process of salt mining to obtain underground salt?

Answer 6

Rock salt is drilled, blasted and dug out then brought to the surface by machinery

Question 7

3. What is the process of solution mining to obtain underground salt?

Answer 7

• water is injected into salt deposit through the outer pipe
• this dissolves the salt into saltwater called brine
• pressure forces the brine to the surface through the inner pipe
• brine is stored in wells on surface and pumped into a refining plant when needed
• in refining plant impurities are removed from brine, then it is boiled so it evaporates to leave just the salt

Question 8

4. Why may the method of rock salt mining be used?

Answer 8

• On roads to stop ice forming: Because it doesn’t have to be pure
  Salt in mix lowers freezing pint of ice, and provides grip on unmelted ice

-enhance flavour in food:
-making chemicals:
Can be used for these purposes when salt is separated out from impurities

Question 9

4. Why may the method of solution mining be used?

Answer 9

-table salt
-chemical production
Because it has to be pure

Question 10

5. How do the methods of obtaining salt have an impact on the environment?

Answer 10

• subsidence cam affect buildings near mines (to reduce fill in after use)
• mining needs lots of energy, so fossil fuels are burnt= pollution, using up finite sources

Question 11

6. What are the advantages of adding salt to food?

Answer 11

• for flavouring

- as a preservative

Question 12

7. What are the health implications of eating too much salt?

Answer 12

• high blood pressure= strokes, heart attacks

- increased chance of stomach cancer, renal failure

Question 13

9. What is an example of a Government department that is involved with food safety issues?

Answer 13

• The Department of Health
• The Department for Environment
• Food and Rural Affairs

Question 14

9. What do The Department of Health, The Department for Environment and Food and Rural Affairs have a role in?

Answer 14

• carrying out risk assessments in relation to chemicals in food to make sure they are safe
• advising the public about how food affects their health