IGCSE Science - Combined (0653) — May–June 2024, Paper 51
4 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →You are going to investigate the effect of copper sulfate on the enzyme amylase (amylase speeds up the breakdown of starch into the sugar maltose; the reaction is followed using…
Answer this question and get it marked →You are going to investigate the reaction of sodium hydrogencarbonate with dilute sulfuric acid (this reaction produces carbon dioxide gas). Put 50 cm3 of dilute sulfuric acid…
Answer this question and get it marked →You are going to determine the density of a wooden block. Fig. 3.1 shows a wooden block with height h, width w and length l. Measure the height h, width w and length l of your…
Answer this question and get it marked →A thermistor is a type of variable resistor used to measure changes in the temperature of water in a beaker. The resistance R of the thermistor at temperature T is calculated…
Answer this question and get it marked →