2023 SAJC J1 WA1 Suggested Answers w Examiners' Comment

1 ST ANDREW’S JUNIOR COLLEGE Weighted Assessment 1 (WA 1) General Certificate of Education Advanced Level Higher 1 ECONOMICS 8843 35 minutes READ THESE INSTRUCTIONS FIRST Write your name and class on all the work you hand in. Write in dark blue or black pen on both sides of the paper. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Answer all questions. At the end of the test, fasten all your work securely together with the question paper provided. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 3 printed pages © SAJC 2023 [Turn Over]

2 Answer all questions Question 1: Singapore Electricity Market Extract 1 Cleaner energy sources Chemical processes can turn biomass into biofuels like ethanol and methanol, and some crops yield vegetable oil, another fuel. Also, when biomass decomposes anaerobically (without air), methane gas is generated, which is yet another potential fuel (methane is CH4, the main component of natural gas). All of these energy sources are derived from biomass plant matter. Generating a significant amount of biomass energy requires large amounts of land. The economics of biomass energy are thus to a large extent land economics. How much land can be made available, and at what price? Using land for biomass energy production al ways has an opportunity cost, since the same land could be used to produce food or fibre, or to preserve wilderness. The effect of large -scale biomass energy use on food availability and prices is a particular concern. Source: The Economics of Renewable Energy, http://ase.tufts.edu/gdae Extract 2 Nearly a quarter of Singapore’s power generation capacity due for replacement in next 5 years: EMA With almost a quarter of Singapore's power generation capacity expected to reach the end of its lifespan over the next five years, the Energy Market Authority (EMA) is studying how future gas power plants entering the power system before 2030 could impact its target for net zero emissions by or around 2050. These power plants that currently run on natural gas, a less polluting fossil fuel that produces 95 per cent of the country's energy, will remain the "backbone of Singapore's electricity generation" even as the power sector decarbonises, the industry regulator said in a tender on Sept 8. This comes after a report, which was commissioned by EMA, said in March that it is realistic for the power sector to bring down its planet