IGCSE Science - Combined (0653) — May–June 2023, Paper 41

Fig. 1.1 shows the circulatory system of frogs and the circulatory system of humans (NOT TO SCALE), with a blood vessel labelled X in the human system. Identify the type of blood…

An electric current is passed through concentrated aqueous sodium chloride using inert electrodes (Fig. 2.1: chlorine at the positive electrode, hydrogen at the negative…

Fig. 3.1 shows two people keeping warm by a campfire, one playing a guitar. State the process by which the people are warmed by energy coming directly from the fire.

Fig. 4.1 shows part of a food web (fruit → flying squirrel, beaver; owl; cougar). Table 4.1 lists terms (producer, herbivore, secondary consumer) for organisms (flying squirrel,…

Table 5.1 shows information about alkanes and alkenes (number of carbon atoms vs name and formula). The general formula of alkanes is CnH(2n+2). Deduce the general formula of…

Fig. 6.1 shows a moving conveyor belt carrying a box from the ground up to an aircraft. Complete the sentence. The gravitational force acting on the box is called the of the box.

Two young potted plants are left to grow in a room with no light: plant A placed upright, plant B placed on its side. Fig. 7.1 shows the plants after 10 days (pale yellow leaves;…

An iron nail is placed in a test-tube with air (Fig. 8.1). After one week, a layer of rust has formed. The equation for the reaction that forms rust is 4Fe + O2 → Fe2O3. Balance…

Fig. 9.1 shows a student using a laptop computer with a lamp beside the student. Fig. 9.2 is a diagram of the student (eye), lamp and computer screen; the ray shows how the…