PJC_H2_GEO_P2_MarkingGuide

JC2 H2 2018 Prelims Marking Guide Section A Theme 4: Geographical Investigation 1 A group of 8 students were tasked to undertake a primary fieldwork on investigating infiltration on different landuse. The group selected a study area in Coney Island with possible sites of varying landuse. The group was divided up into two teams of four to measure the infiltration rates at two different sites. One site (Site A) was a site covered with grass. The other site (Site B) was located on a beach with sandy soil. Both teams carried out the primary investigation at Sites A and B in the study area in Resource 1 on 3 September 2018 (Monday). Teams were each given the following equipment to gather primary data on infiltration rates: • Milo Tin (as infiltration tube) • Ruler • Stop watch • Water The infiltration rate was calculated by finding out the time it took for water level in the cylinder to fall by 1cm. The time took for the water level to drop by 1cm was defined using a ruler and personal observation. The data collected was recorded using a data collection sheet. Resource 1 shows the map of both Sites A and B. Resource 2 shows the land use associated with each site. Resource 3 shows the data collected by one of the teams to calculate the infiltration rates associated with each site. (a) With reference to Resource 2, suggest a suitable hypothesis and provide two reasons why it is at a suitable scale. Award 1 mark for any testable and sensible related to type of landuse and the infiltration rate. Possible response include: • Hypothesis: Infiltration rate is lower at Site A, which is a vegetated area, compared to that on Site B, which is a sandy beach. • It is at a suitable scale as it has a clearly defined research areas – the role of landuse in affecting the infiltration rate • Sites of differing landuse – sandy beach and vegetated area • 2 sites which are of close proximity • Task is within the capability of the students Point Marked [3] (b) Explain how both teams can minimise the risks in carrying out their primary investigation at Sites A and B as shown in Resource 2. Possible responses include: • Risk: General safety [4]

2 o Do a reconnoitre trip to map out places of potential hazards and places that can give first aid (e.g. clinics) – also to identify a shelter area during the bad weather conditions o Check weather forecast and to do data co llection on another day if the event of bad weather. o Ensure that there is first-aider and first aid kit for both teams o Wear proper footwear to protect from sharp objects o Wear hats or use umbrella when the we ather is too hot and have proper hydration • Risk: Water safety at Site B o Check high tide and low tide time and be aware of the high tide mark on the beach at Site B • Risk: Timing of primary data collection o Ensure that the data collection is done in the morning and avoid afternoon when it