Paper 2 H - SAMPLE SET 1 Q2 Answers
2) Water from a lake in the UK is used to produce drinking water.
2.1) What are the two main steps used to treat water from lakes?
Give a reason for each step. [2 marks]
Step 1 ____________________________________________
Reason ___________________________________________
Step 2 ____________________________________________
Reason ___________________________________________
2.2) Explain why it is more difficult to produce drinking water from waste water than from water in lakes. [3 marks]
2.3) Some countries make drinking water from sea water.
Complete Figure 1 to show how you can distil salt solution to produce and collect pure water.
Label the following:
2.1) What are the two main steps used to treat water from lakes?
Give a reason for each step. [2 marks]
Step 1 ____________________________________________
Reason ___________________________________________
Step 2 ____________________________________________
Reason ___________________________________________
2.2) Explain why it is more difficult to produce drinking water from waste water than from water in lakes. [3 marks]
2.3) Some countries make drinking water from sea water.
Complete Figure 1 to show how you can distil salt solution to produce and collect pure water.
Label the following:
- pure water
- salt solution.
2.4) How could the water be tested to show it is pure?
Give the expected result of the test for pure water. [2 marks]
2.5) Why is producing drinking water from sea water expensive? [1 mark]
(Total for Question 2 = 11 marks)
Give the expected result of the test for pure water. [2 marks]
2.5) Why is producing drinking water from sea water expensive? [1 mark]
(Total for Question 2 = 11 marks)