IGCSE Science - Combined (0653) — October–November 2023, Paper 42

Fig. 1.1 shows the transfer of pollen from flower A to flower B. Complete the sentences about Fig. 1.1. The pollen is transferred from the anthers of flower A to the of flower B.…

Magnesium chloride is a soluble salt. Magnesium chloride is made in the reaction between solid magnesium oxide and a dilute acid (Fig. 2.1 shows solid magnesium oxide being added…

Fig. 3.1 shows a truck. Fig. 3.2 shows a speed–time graph for the motion of the truck on a journey (speed in m/s, 0–15, vs time in s, 0–300). State the time taken by the truck to…

Fig. 4.1 shows a food web (tree → caterpillar and beetle; caterpillar → blackbird and thrush; beetle → thrush; blackbird, thrush → hawk). Table 4.1 lists some organisms…

A student investigates the reaction of dilute hydrochloric acid with different metals, measuring the volume of gas produced during the first 20 s using the apparatus in Fig. 5.1.…

Fig. 6.1 shows a lighthouse used at night to warn ships of dangerous rocks in the sea. Light from the lamp is focused to form two parallel beams using two identical thin…

Explain one way the structure of an artery is adapted to its function.

Iron is extracted from hematite in a blast furnace. The chemical equation for one of the reactions in the blast furnace is shown: Fe2O3 + CO → Fe + CO2 Complete the balanced…

Fig. 9.1 shows two identical floodlights, F and G, at a sports ground. Fig. 9.2 shows a wind turbine used to generate electricity for the two floodlights. The wind turbine…