10.1 - SPECIMEN SET C2 Q1
1) Rainwater is collected from the roofs of houses as shown in Figure 1.
1.1) The water in the storage tank is not potable.
What does potable mean? [1 mark]
Tick one box.
What does potable mean? [1 mark]
Tick one box.
1.2) Why should the water in the tank be filtered to make it potable? [1 mark]
Tick one box.
Tick one box.
1.3) A gas which bleaches litmus paper can be added to the water to make it potable.
Name this gas and explain why it is added. [2 marks]
The storage tank is made from concrete reinforced with steel wire, as shown in Figure 2.
Name this gas and explain why it is added. [2 marks]
The storage tank is made from concrete reinforced with steel wire, as shown in Figure 2.
Figure 3 shows how the distance between the steel wires affects the relative strength of the concrete.
1.4) Use values from Figure 3 to describe the relationship shown by the graph. [2 marks]
(Total for Question 1 = 6 marks)
(Total for Question 1 = 6 marks)