NJC Prelim_H2_GEO_P2_QP

National Junior College SH2 Preliminary Examinations 2017 GEOGRAPHY Paper 2 Data Response Questions Higher 2 9751/02 3 Hours 28 August 2017 READ THESE INSTRUCTIONS FIRST Write your index number and name on the work you hand in. Write in dark blue or black pen on both sides of the paper. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Candidates answer all questions. The Insert contains all the Resources referred to in the questions. You should make reference to appropriate examples studied in the field or the classroom, even where such examples are not specifically requested by the question. Diagrams and sketch maps should be drawn whenever they serve to illustrate an answer. The world outline map may be annotated and handed in with relevant answers. You are reminded of the need for good English and clear presentation in your answers. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 6 printed pages.

2 Section A Theme 4 – Geographical Investigation 1 A group of budding student researchers were tasked to undertake a fieldwork exercise to ascertain which sites along the newly built Punggol Waterway are likely to flood. The sites are labelled in Resource 1 as Sites X, Y and Z. The group was divided into three teams to measure the river velocity, the cross- sectional area of the river channel and the infiltration rates of the river bank at each site. The first two teams were given the following equipment to gather the primary data on river velocity and cross-sectional area:  1 x Table tennis ball  2 x Tape measures  2 x Stop watch  1 x Meter ruler  4 x Range poles To measure river velocity, t he time taken for the table tennis ball to cover a pre - determined distance defined by two range poles at the side of the river was recorded for each site. The team noticed that the table tennis ball would stay stationary or even swerve its direction of movement momentarily. To calculate the cross-sectional area, the width and depth of the river at each site had to be measured. The width was measured by laying the tape measure across the width of the river, and anchoring the tape to both banks of the river using the range poles. The tape measure had to be tight and taut. The depth was measured and recorded by using the meter rule at every 30-cm interval mark across the width. The data was then plotted and the cross-sectional area was calculated using the following formula: Cross-sectional area = Width x Depth At every site, the team collecting the river velocity data worked downstream from the team collecting the measurements for cross-sectional area. The third team was given the following equipment to gather the primary data on infiltration rates: