BV 4NA HUM (GEOGRAPHY) PRELIMS 2020 ANS

BEDOK VIEW SECONDARY SCHOOL PRELIMINARY EXAMINATION 2020 CANDIDATE NAME REGISTER NUMBER CLASS HUMANITIES 2175/02 Secondary Four Normal (Academic) 11 August 2020 Paper 2 Geography 1 hour 40 minutes MARK SCHEME Setters: Mdm Syafiqah This document consists of 21 printed pages, including this cover page.

2 Section A Answer Question 1 from this section. 1 Some students were investigating local weather conditions. A group of students studied temperature and rainfall. They had one guiding question to answer ‘Does temperature affect rainfall?’ The students carried out the investigation in their school fiel d. They took the recordings once a day over a period of 7 day s, using maximum and minimum thermometer, rain gauge and sling psychrometer. Study Table 1, which shows their findings for their investigation. Table 1 Results of weather data collected Day Temperature (°C) Rainfall (mm) Relative Humidity (%) 1 29 50 87 2 26 65 60 3 27 35 90 4 28 44 89 5 32 66 64 6 33 80 55 7 31 51 68 Using Table 1, calculate the average temperature from Day 1 to 7. Round up your answer to 1 decimal place. Award 1m for each point. No marks will be given if working is not shown. • (29 + 26 + 27+ 28 + 32 + 33+ 31) / 7 = 206 / 7 = 29.4°C [1] (b) Describe the steps the students need to take to measure rainfall. Award 1m for each point. • Find an appropriate spot to place the rain gauge and position the rain gauge in an open area. • Place the rain gauge into the ground with about 30 cm protruding above ground. Record the time at which the rainfall events start and end. • Pour the collected water in the rain gauge into a measuring cylinder. Read and record the water level. [3] (a)

3 (c) Using data in Table 1, plot a scatter graph to show the relationship between temperature (°C) and rainfall (mm). Draw the line of best fit. [3] Award 1m for correct title and correct axis. Award 1m for accurate plotting. Award 1m for correct (positive) relationship, as shown by line of best fit. Award no mark if independent and dependent variable are not accurately drawn. (d) The students came up with a hypothesis, ‘When temperature increases, rainfall decreases.’ With reference to Table 1 and scatter graph drawn in (c), comment on the relationship between temperature and rainfall. Award 1m for each point. Reserve 1m for anomaly. Reserve 1m for conclusion. • The data shows that when temperature increases, rainfall also increases. • When temperature is low at 27°C in Day 2, rainfall is also the lowest at 35mm. When temperature is higher in Day 7 at 33 °C, an increase of 6°C, rainfall also increases to 80mm, showing an increase of 45mm. • However, the anomaly is in Day 1, where temperature is the lowest at 26°C b