IGCSE Science - Combined (0653) — October–November 2023, Paper 43

Fig. 1.1 shows part of the breathing system in humans, with the trachea labelled and parts A and B also marked. State the names of the parts labelled A and B in Fig. 1.1. A = ...…

Fig. 2.1 shows the electrolysis of concentrated aqueous sodium chloride using platinum electrodes (chlorine gas forms at the positive electrode). Table 2.1 gives some information…

Fig. 3.1 shows a firefighter standing next to a fire engine. The firefighter sprays water onto the fire. The temperature of the fire is 600 °C. The firefighter is heated by the…

Fig. 4.1 shows part of the human alimentary canal and associated organs (with the small intestine labelled). Draw a label line and the letter G on Fig. 4.1 to identify the gall…

Table 5.1 gives information on the percentage composition of the atmosphere of the planet Mars: carbon dioxide 95.0%, nitrogen 1.9%, argon 1.9%. The atmosphere of Mars contains…

A spring has an original length of 10.0 cm. An object is suspended from the spring, and the spring extends to a length of 12.0 cm, as shown in Fig. 6.1. Determine the extension of…

Fig. 7.1 shows the drawing of a cross-section through a root, with a root hair cell and part P (the xylem) labelled. State two functions of the part labelled P in Fig. 7.1.

Table 8.1 shows information about some alkanes and alkenes (by number of carbon atoms): C2 alkane ethane C2H6, alkene ethene (formula missing); C3 propane C3H8, propene C3H6; C4…

Fig. 9.1 shows an ultraviolet torch used to kill bacteria and viruses on surfaces. When switched on, the torch emits both ultraviolet radiation and visible light. Fig. 9.2 shows…