IGCSE Sciences - Co-Ordinated (0973) — May–June 2025, Paper 42
12 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Fig. 1.1 is a diagram of a root hair cell. The cell has a long thin projection (the root hair) extending to the right. Letters A-E label structures in the cell: A points to a…
Answer this question and get it marked →Fig. 2.1 is a diagram of the human breathing system. The alveoli are labelled on the left side. Letters A-E label parts of the system: A points to the top of the central tube…
Answer this question and get it marked →Table 3.1 shows the diameter of a flu virus and different types of cells. Table 3.1 diameter / um --- --- flu virus 0.1 bacterial cell 1.0 red blood cell 7.0 lymphocyte 15.0 plant…
Answer this question and get it marked →Orcas are large mammals that live in the sea. Orcas reproduce using egg cells and sperm cells like humans. Describe two adaptive features of egg cells.
Answer this question and get it marked →The element carbon has a proton (atomic) number of 6. Complete Fig. 5.1 to show the electronic configuration of a carbon atom. Fig. 5.1 shows a central nucleus labelled C…
Answer this question and get it marked →Fig. 6.1 shows the structural formula of a molecule, X. The structure is a chain: H2N-CH2-CH2-CH2-CH2-CH2-CH2-NH2, i.e. an amine group (NH2) at each end joined by a chain of six…
Answer this question and get it marked →The ionic compound sodium sulfate contains the ions Na+ and SO4^2-. Determine the formula of sodium sulfate. formula = ...........
Answer this question and get it marked →A student investigates the reaction between dilute hydrochloric acid and solid pieces of calcium carbonate. The balanced symbol equation for the reaction is shown. Complete the…
Answer this question and get it marked →A torch (flashlight) consists of a battery, a switch and a lamp connected in series. Fig. 9.1 shows a torch. State the energy store which decreases when the battery powers the…
Answer this question and get it marked →State the relationship between the direction of vibration and the direction of propagation of a transverse wave.
Answer this question and get it marked →In a nuclear power station, the process of nuclear fission is used to generate electrical power. Describe the process of nuclear fission.
Answer this question and get it marked →The explosion of a supernova forms a nebula. State what may form from this nebula.
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