Practical skills — IGCSE Sciences - Co-Ordinated (0973) questions by topic
Practical skills here means planning an investigation into mouthwash and saliva pH, weighing modelling clay on a balanced metre rule, reacting magnesium with copper sulfate, and tracking dissolved carbon dioxide from photosynthesising organisms, worth from 1 to 15 marks in this IGCSE Co-ordinated Sciences set.
Suggest, calculate and state top the command words, with find and record also frequent: suggest a variable to control, not just list apparatus. 60 real questions from 2023 to 2025 papers sit here. Submitting a planned method or a recorded result for instant marking shows exactly how precisely a variable, control, or reading needs to be described to earn credit.
May–June 2025, Paper 11
The total thickness of 500 sheets of paper is 4.5 cm. What is the thickness of 1 sheet of paper in mm? A 0.0090 mm B 0.090 mm C 0.90 mm D 9.0 mm
Answer this question and get it marked →May–June 2025, Paper 51
Procedure: step 1 Cut one small cube of 5 x 5 x 5 mm from one of the large cubes. step 2 Place the small cube of agar jelly in a clean beaker. step 3 Pour hydrochloric acid into…
Answer this question and get it marked →Procedure: - Stir the suspension of yeast cells with a clean stirring rod. - Pour approximately 1 cm depth of the suspension of yeast cells into a clean test-tube. - Use a syringe…
Answer this question and get it marked →Procedure: - Almost fill a burette with dilute hydrochloric acid. - Record in Table 3.1 in column J this initial burette reading to one decimal place. - Use a measuring cylinder…
Answer this question and get it marked →An iron key is electroplated with copper metal using the apparatus shown in Fig. 4.1. The apparatus is an electrolysis cell: a battery (positive and negative terminals) connected…
Answer this question and get it marked →Procedure: - Use a balance to record the mass m of 5 glass marbles. m = .......................... g - Approximately half-fill a 50 cm^3 measuring cylinder with water. - Record…
Answer this question and get it marked →A pendulum is set up as shown in Fig. 6.1 (a bob hanging on a string from a clamp on a stand; the length l is marked from the bottom of the clamp to the bob). The length l is the…
Answer this question and get it marked →May–June 2025, Paper 61
A student investigates diffusion in animals. The student uses agar jelly cubes to represent different sized animals. Each cube contains a green coloured indicator that turns red…
Answer this question and get it marked →A student investigates an enzyme-controlled reaction. Yeast and some plants contain the enzyme catalase. Catalase speeds up the breakdown of hydrogen peroxide, releasing oxygen…
Answer this question and get it marked →A student investigates the neutralisation of dilute hydrochloric acid by aqueous sodium hydroxide. The student does two experiments, one with aqueous sodium hydroxide J, and the…
Answer this question and get it marked →An iron key is electroplated with copper metal using the apparatus shown in Fig. 4.1. The apparatus is a battery (positive and negative terminals) connected in a circuit with a…
Answer this question and get it marked →A student does an experiment to find the density of glass using solid glass marbles. Procedure. The student: uses a balance to find the mass m of 6 glass marbles; pours water into…
Answer this question and get it marked →A student does an experiment to find a value for the acceleration of free fall g using a pendulum. Procedure. The student: sets up a pendulum as shown in Fig. 6.1 (a pendulum bob…
Answer this question and get it marked →May–June 2025, Paper 62
Fig. 1.1 is a photograph of a flower (a crocus-type flower shown from the side, with two labelled points A and B on the outer petals). In the box, make a large, detailed pencil…
Answer this question and get it marked →Fig. 3.1 shows the thermometer reading of the water. The thermometer is marked in degrees C with major graduations at 10, 20 and 30 and minor graduations between them; the liquid…
Answer this question and get it marked →Fig. 4.1 shows the thermometer reading for the highest temperature of the solution. The thermometer is marked in degrees C with major graduations at 40 and 50 and minor…
Answer this question and get it marked →The student measures the height of the ball above the sand. Fig. 5.3 shows the ball just before it is dropped, positioned against a vertical cm ruler whose scale is marked at 16,…
Answer this question and get it marked →The rate of cooling of hot water in a beaker depends upon the number of layers of insulating newspaper wrapped around the beaker. Plan an investigation to find the relationship…
Answer this question and get it marked →May–June 2024, Paper 21
The initial and final readings on a sensitive thermometer used in an experiment are shown (initial about 21.7 C, final about 29.3 C). [Diagram: two thermometer readings, initial…
Answer this question and get it marked →May–June 2024, Paper 61
Fig. 1.1 is a photograph of a slice of an orange shown actual size. In the box, make a large, detailed, pencil drawing of the slice of the orange shown in Fig. 1.1. [Fig. 1.1…
Answer this question and get it marked →A student compares the vitamin C concentration of orange juice with three other fruit juices, D, E and F. DCPIP is a blue solution that decolourises (goes colourless) when vitamin…
Answer this question and get it marked →A student investigates the reaction between magnesium and aqueous copper sulfate. More reactive metals displace less reactive metals from solutions of their salts. magnesium +…
Answer this question and get it marked →A student investigates how the resistance R of a lamp changes as the current I flowing through the lamp changes. The student assembles a circuit with an ammeter, a lamp, a…
Answer this question and get it marked →May–June 2024, Paper 62
A student investigates the concentration of glucose in a solution S. The student adds Benedict's solution to different concentrations of glucose solution. At a glucose…
Answer this question and get it marked →A student tests solution T with biuret reagent and with iodine solution. Complete Table 2.1 by recording the initial colour and final colour of each testing solution. Table 2.1:…
Answer this question and get it marked →A student determines the percentage of magnesium in a mixture of magnesium and copper. Fig. 3.2 shows the reading on the balance before and after adding the Mg/Cu mixture. [Fig.…
Answer this question and get it marked →Plan an experiment to find the relationship between the mass of salt dissolved in water and the increase in boiling temperature of the water. In your plan include: - the apparatus…
Answer this question and get it marked →A student determines the mass of a piece of modelling clay using a balanced metre rule. A 100 g mass is placed at the 10.0 cm mark of a metre rule. The modelling clay is placed at…
Answer this question and get it marked →A student investigates the rate of cooling of hot water. Fig. 6.1 shows a thermometer placed in the room to measure room temperature. [Fig. 6.1: A thermometer showing the room…
Answer this question and get it marked →October–November 2024, Paper 61
A student investigates how the concentration of hydrogen peroxide affects the height of foam produced when yeast (which contains catalase) is added. Plan a table to record the…
Answer this question and get it marked →A student investigates the effect of adding different volumes of mouthwash on the pH of saliva. Plan an investigation to find out how the volume of mouthwash affects the pH of…
Answer this question and get it marked →A student heats different metal carbonates and records the time for limewater to turn milky, to compare their reactivity. The student uses copper carbonate (Cu) and iron carbonate…
Answer this question and get it marked →A student uses electrochemical cells to compare the reactivity of metals. Table 4.1 shows the voltage produced when each metal is connected with copper. metal voltage (V) -------…
Answer this question and get it marked →A student investigates how the resistance of a wire varies with its length. Fig. 6.1 shows the circuit used. Fig. 6.2 shows the ammeter reading. [Fig. 6.2: Ammeter showing a…
Answer this question and get it marked →A student measures the density of water using two methods. In method 1, the student uses a measuring cylinder and balance. Fig. 7.1 shows the balance reading for the empty…
Answer this question and get it marked →May–June 2023, Paper 51
You are going to investigate the use of an enzyme for the extraction of juice from apples. You are provided with two beakers of apple puree, a solution of an enzyme and some warm…
Answer this question and get it marked →You are going to test some of the apple juice (made in Question 1) for its nutrient content. Procedure: pour about 1 cm depth of apple juice from measuring cylinder A into a…
Answer this question and get it marked →You are going to investigate the rate of the reaction between solutions K and H. When solutions of K, H and starch are mixed together, a blue-black colour is observed after a…
Answer this question and get it marked →Aqueous hydrogen peroxide breaks down slowly into water and oxygen gas: hydrogen peroxide - water + oxygen. A catalyst increases the rate of a chemical reaction. Manganese(IV)…
Answer this question and get it marked →You are going to investigate the stretching of a spring. The spring and the metre rule have been set up as shown in Fig. 5.1 (spring hanging from a clamp beside a vertical metre…
Answer this question and get it marked →You are going to investigate the cooling of hot water in a beaker. You are provided with a beaker, a supply of hot water and a thermometer. Procedure: pour 200 cm3 of hot water…
Answer this question and get it marked →May–June 2023, Paper 61
A student investigates the use of an enzyme for the extraction of juice from apples. The student assembles two beakers A and B with the same volumes of apple puree, adds the same…
Answer this question and get it marked →The student tests some apple juice for its nutrient content. The apple juice tests positive with Benedict's solution and negative with biuret solution. Record in Table 2.1 the…
Answer this question and get it marked →A student investigates the rate of the reaction between solutions H and K. When solutions of H, K and starch are mixed together, a blue-black colour is observed after a period of…
Answer this question and get it marked →Aqueous hydrogen peroxide breaks down slowly into water and oxygen gas: hydrogen peroxide - water + oxygen. A catalyst increases the rate of a chemical reaction. Manganese(IV)…
Answer this question and get it marked →A student investigates the stretching of a spring, assembling the spring and a metre rule as shown in Fig. 5.1. Fig. 5.2 shows a full-size diagram of the unstretched spring and…
Answer this question and get it marked →A student investigates the cooling of hot water in a beaker. The student measures the room temperature as 22.0 C, pours 200 cm3 of hot water into a beaker, places a thermometer in…
Answer this question and get it marked →May–June 2023, Paper 62
A student investigates the effect of plants and animals on their aqueous environment. Organisms that photosynthesise or respire affect the concentration of carbon dioxide…
Answer this question and get it marked →A student investigates three nutrient solutions D, E and F for the presence of reducing sugar. The student adds 2 cm3 of Benedict's solution to three test-tubes containing the…
Answer this question and get it marked →The seeds of a sycamore tree (Fig. 3.1) have 'wings' to help carry them in the wind. Fig. 3.2 shows sycamore seeds fallen from the parent tree, having travelled a horizontal…
Answer this question and get it marked →A student investigates the rate of reaction between solutions H and K. When solutions of H, K and starch are mixed, a blue-black colour is seen after a period of time; changing…
Answer this question and get it marked →A student identifies the ions present in solution L and in solution M. Table 5.1 shows cation tests: adding aqueous sodium hydroxide (a few drops, then excess) gives no…
Answer this question and get it marked →A student measures the mass M of an object using a balancing method. The object is fixed to a metre rule with its centre over the 15.0 cm mark; a pivot is placed under the 50.0 cm…
Answer this question and get it marked →A student investigates the image formed by a convex lens. The apparatus (Fig. 7.1) has a lamp, an illuminated object (a triangular hole in a card), a convex lens in a holder and a…
Answer this question and get it marked →October–November 2023, Paper 61
A student tests milk and rice for their nutrient content. To make 'rice water' the student adds water to rice, leaves it for 5 minutes, stirs and pours off the rice water into two…
Answer this question and get it marked →Fig. 2.1 shows a photomicrograph of a single-celled organism called Euglena (an oval cell, pointed at one end, with internal structures). In the box below, make a large, detailed…
Answer this question and get it marked →A student investigates the neutralisation of dilute hydrochloric acid with aqueous sodium hydroxide (an exothermic reaction). The student puts 25 cm3 of dilute hydrochloric acid…
Answer this question and get it marked →A student investigates the formation of silver chloride in the test for chloride ions. When aqueous silver nitrate is added to aqueous sodium chloride, a white precipitate forms;…
Answer this question and get it marked →A student investigates the resistance of different lamp combinations, setting up the circuit in Fig. 5.1 (circuit 1: one lamp between points X and Y, with an ammeter and a…
Answer this question and get it marked →Plan an experiment to investigate whether the material a wire is made from affects the mass required to break the wire. One end of the wire is securely held by a clamp and masses…
Answer this question and get it marked →Other IGCSE Sciences - Co-Ordinated topics
- Motion, forces and energy (77)
- Electricity and magnetism (65)
- Organic chemistry (40)
- Waves (40)
- Atoms, elements and compounds (29)
- Organisms and their environment (28)
- Stoichiometry (24)
- Chemical reactions (22)
- The Periodic Table (22)
- Human nutrition (21)
- Reproduction (21)
- Thermal physics (20)