Practical skills — IGCSE Sciences - Co-Ordinated (0654) questions by topic
Practical skills carries the heaviest weighting in this syllabus: 146 questions from 2023 and 2024 papers, worth anywhere from 3 to 20 marks, covering measuring a clay cube's mass on a rule, planning a mouthwash pH investigation, drawing a citrus slice to scale, and identifying an unknown metal from its reactions.
Record, calculate and suggest lead the command words, each demanding a specific procedural answer rather than recalled fact, so precision in units, repeats and labelling matters as much as the science itself. Submit timed attempts at the recording and drawing questions for instant marking to see, line by line, whether your measurements, averages and observations meet the mark scheme's exacting detail.
What examiners look for
- Examiners note few candidates correctly worked out the average time as 35.3 seconds, pointing to care needed when combining repeat readings.
- A recurring criticism is that direction arrows on diagrams were frequently drawn the wrong way round.
- Reports flag that identifying the angle of incidence on a ray diagram was often missed.
- Few candidates thought to suggest testing with a magnet when distinguishing steel from aluminium in an investigation.
May–June 2024, Paper 51
You are provided with a slice of a citrus fruit. In the box, make a large, detailed, pencil drawing of the slice of fruit.
Answer this question and get it marked →You are going to compare the vitamin C concentration of orange juice with other fruit juices. DCPIP is a blue solution that decolourises (goes colourless) when vitamin C is added…
Answer this question and get it marked →You are going to investigate 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 →You are going to identify the ions in solution H. Procedure: Add approximately 2 cm depth of solution H into each of five clean test-tubes. Soak a wooden splint in one test-tube…
Answer this question and get it marked →You are going to investigate how the resistance R of a lamp changes as the current I flowing through the lamp changes. Fig. 5.1 shows a circuit using a lamp, with a voltmeter V…
Answer this question and get it marked →A student investigates the cooling of hot water in a beaker. Plan an experiment to investigate the relationship between the thickness of the cardboard insulation wrapped around a…
Answer this question and get it marked →May–June 2024, Paper 52
You are going to investigate the glucose concentration of solution S. You are provided with solution S and four different concentrations of glucose solution. Procedure: step 1…
Answer this question and get it marked →You are going to test solution T for the presence of two different nutrients. Procedure: step 1 Add approximately 1 cm depth of solution T into each of two clean test-tubes. step…
Answer this question and get it marked →You are going to find the percentage by mass of magnesium in a mixture of magnesium and copper using two different calculations. When the mixture is added to dilute hydrochloric…
Answer this question and get it marked →Pure water boils at a temperature of 100 degrees C. When salt is dissolved in the water, the boiling temperature increases. Plan an experiment to find the relationship between the…
Answer this question and get it marked →You are going to determine the mass of a piece of modelling clay by two different methods. You are provided with a metre rule, a pivot and a piece of modelling clay. Procedure:…
Answer this question and get it marked →You are going to investigate the rate of cooling of hot water. The apparatus is assembled as shown in Fig. 6.1 (a thermometer held by a stand above a beaker). Record the room…
Answer this question and get it marked →May–June 2024, Paper 53
You are going to investigate the effect of temperature on the movement of molecules through a cell membrane. Dialysis (Visking) tubing behaves like a cell membrane. You are…
Answer this question and get it marked →Plant seedlings need light to grow. Plan an investigation to determine if the colour of the light affects the rate of growth of plant seedlings. You are provided with plant…
Answer this question and get it marked →You are going to investigate the thermal energy released during a neutralisation reaction. When aqueous sodium hydroxide neutralises dilute hydrochloric acid, the temperature of…
Answer this question and get it marked →You are going to investigate the ions present in solution H. Procedure: Add approximately 1 cm depth of solution H into each of five test-tubes. Soak a wooden splint in one of…
Answer this question and get it marked →You are going to investigate the stretching of a spring. The apparatus is assembled as shown in Fig. 5.1 (a spring hung vertically from a clamp on a stand, beside a metre rule…
Answer this question and get it marked →You are going to investigate the resistance of lamps. The circuit is assembled as shown in Fig. 6.1 (circuit 1: an ammeter A in series with a single lamp between points X and Y,…
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, with two points A and B marked. In the box, make a large, detailed, pencil drawing of the slice of the orange…
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 when vitamin C is added; high…
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: magnesium + copper sulfate - magnesium…
Answer this question and get it marked →A student identifies a solution labelled H. The student puts solution H into five test-tubes and does the tests in Table 4.1, identifying H as aqueous potassium chloride. Complete…
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 the circuit shown in Fig. 5.1 (an ammeter A…
Answer this question and get it marked →A student investigates the cooling of hot water in a beaker. Plan an experiment to investigate the relationship between the thickness of the cardboard insulation wrapped around a…
Answer this question and get it marked →May–June 2024, Paper 62
A student investigates the glucose concentration of solution S. Benedict's solution is added to glucose solutions of different concentrations which are then heated; the resulting…
Answer this question and get it marked →A student tests solution T for the presence of two different nutrients. The student does the tests shown in Table 2.1 on solution T. Solution T tests negative with the biuret…
Answer this question and get it marked →A student determines the percentage by mass of magnesium in a mixture of magnesium and copper using two different calculations. When the mixture is added to dilute hydrochloric…
Answer this question and get it marked →Pure water boils at a temperature of 100 degrees C. When salt is dissolved in the water, the boiling temperature increases. Plan an experiment to find the relationship between the…
Answer this question and get it marked →A student determines the mass of a piece of modelling clay by two different methods. Procedure: the student moulds the clay into a cube, places it on a metre rule so its centre is…
Answer this question and get it marked →A student investigates the rate of cooling of hot water. Fig. 6.1 shows the reading on a thermometer to measure room temperature (scale 10, 20, 30 degrees C). Record the room…
Answer this question and get it marked →May–June 2024, Paper 63
A student investigates the effect of temperature on the movement of molecules through a cell membrane. Dialysis (Visking) tubing behaves like a cell membrane. Procedure: the…
Answer this question and get it marked →Plant seedlings need light to grow. Plan an investigation to determine if the colour of the light affects the rate of growth of plant seedlings. You are provided with plant…
Answer this question and get it marked →A student investigates the thermal energy released during a neutralisation reaction. When aqueous sodium hydroxide neutralises dilute hydrochloric acid, the temperature of the…
Answer this question and get it marked →A student investigates the identity of a solution H. The student does five different tests on solution H and identifies it as aqueous copper(II) chloride. Complete Table 4.1 with…
Answer this question and get it marked →A student investigates the stretching of a spring. The apparatus is assembled as shown in Fig. 5.1 (a spring hung vertically from a clamp on a stand, beside a metre rule held in…
Answer this question and get it marked →A student investigates the resistance of lamps. The student assembles the circuit shown in Fig. 6.1 (circuit 1: an ammeter A in series with a single lamp between points X and Y).…
Answer this question and get it marked →October–November 2024, Paper 51
You are going to investigate an enzyme-controlled reaction. Catalase is an enzyme found inside living cells such as yeast cells. It catalyses the breakdown of hydrogen peroxide,…
Answer this question and get it marked →The pH of saliva in the mouth is approximately 7. Eating and drinking lowers the pH of saliva in the mouth. This can cause tooth decay. Mouthwash is sometimes used to raise the pH…
Answer this question and get it marked →You are going to investigate the reactivity of metals by measuring when metal carbonates break down and release carbon dioxide when they are heated. The carbonate of a more…
Answer this question and get it marked →You are going to investigate the reactivity of metals by measuring voltages in electrochemical cells. When two different metals are dipped into an aqueous salt solution, they…
Answer this question and get it marked →You are going to investigate the changes in potential difference V across a length of resistance wire in an electrical circuit. Fig. 5.1 shows a circuit with a resistance wire (an…
Answer this question and get it marked →You are going to use two different methods to measure the density of water. Method 1: Record the mass m1 of the empty 100 cm^3 measuring cylinder to the nearest gram.
Answer this question and get it marked →October–November 2024, Paper 52
You are going to investigate an enzyme-controlled reaction. Catalase is an enzyme found inside living cells such as yeast cells. It catalyses the breakdown of hydrogen peroxide,…
Answer this question and get it marked →The pH of saliva in the mouth is approximately 7. Eating and drinking lowers the pH of saliva in the mouth. This can cause tooth decay. Mouthwash is sometimes used to raise the pH…
Answer this question and get it marked →You are going to investigate the reactivity of metals by measuring when metal carbonates break down and release carbon dioxide when they are heated. The carbonate of a more…
Answer this question and get it marked →You are going to investigate the reactivity of metals by measuring voltages in electrochemical cells. When two different metals are dipped into an aqueous salt solution, they…
Answer this question and get it marked →You are going to investigate the changes in potential difference V across a length of resistance wire in an electrical circuit. Fig. 5.1 shows a circuit with a resistance wire (an…
Answer this question and get it marked →You are going to use two different methods to measure the density of water. Method 1: Record the mass m1 of the empty 100 cm^3 measuring cylinder to the nearest gram.
Answer this question and get it marked →October–November 2024, Paper 53
You are going to investigate an enzyme-controlled reaction. Catalase is an enzyme found inside living cells such as yeast cells. It catalyses the breakdown of hydrogen peroxide,…
Answer this question and get it marked →The pH of saliva in the mouth is approximately 7. Eating and drinking lowers the pH of saliva in the mouth. This can cause tooth decay. Mouthwash is sometimes used to raise the pH…
Answer this question and get it marked →You are going to investigate the reactivity of metals by measuring when metal carbonates break down and release carbon dioxide when they are heated. The carbonate of a more…
Answer this question and get it marked →You are going to investigate the reactivity of metals by measuring voltages in electrochemical cells. When two different metals are dipped into an aqueous salt solution, they…
Answer this question and get it marked →You are going to investigate the changes in potential difference V across a length of resistance wire in an electrical circuit. Fig. 5.1 shows a circuit with a resistance wire (an…
Answer this question and get it marked →You are going to use two different methods to measure the density of water. Method 1: Record the mass m1 of the empty 100 cm^3 measuring cylinder to the nearest gram.
Answer this question and get it marked →October–November 2024, Paper 61
A student investigates an enzyme-controlled reaction. Catalase is an enzyme found inside living cells such as yeast cells. It catalyses the breakdown of hydrogen peroxide,…
Answer this question and get it marked →The pH of saliva in the mouth is approximately 7. Eating and drinking lowers the pH of saliva in the mouth. This can cause tooth decay. Mouthwash is sometimes used to raise the pH…
Answer this question and get it marked →A student investigates the reactivity of metals by measuring how long metal carbonates take to break down and release carbon dioxide when heated. The carbonate of a more reactive…
Answer this question and get it marked →A student investigates the reactivity of metals by measuring the voltage in electrochemical cells. When two different metals are dipped into an aqueous salt solution they produce…
Answer this question and get it marked →A student is given four solutions with labels H, J, K and L. The solutions are: aqueous copper chloride; aqueous zinc chloride; aqueous iron(II) chloride; aqueous magnesium…
Answer this question and get it marked →A student investigates the changes in potential difference V across a length of resistance wire. The student assembles the circuit shown in Fig. 6.1 (an ammeter A, a fixed…
Answer this question and get it marked →A student measures the density of water using two different methods. Method 1: the student measures the mass m1 of an empty measuring cylinder using a top-pan balance. Fig. 7.1…
Answer this question and get it marked →October–November 2024, Paper 62
Fig. 1.1 shows a photograph of a shark's tooth, with points A (top, the tip) and B (bottom) labelled. In the box, make a large, detailed, pencil drawing of the tooth in Fig. 1.1.
Answer this question and get it marked →Plaque is a layer of bacteria which forms on teeth. Plaque causes dental decay by producing acid that reduces the pH of the saliva in the mouth. Some students investigate the…
Answer this question and get it marked →A student investigates the effect of temperature on the volume of a gas. The student pulls approximately 50 cm^3 of air into a glass syringe, seals the end of the syringe with a…
Answer this question and get it marked →A student investigates the identity of a metal H. The student: (step 1) adds metal H to a beaker of cold water; (step 2) tests to identify the gas given off; (step 3) does a flame…
Answer this question and get it marked →A student investigates the combined resistance of different combinations of identical resistors. The student assembles the circuit shown in Fig. 5.1 (circuit 1: a cell, a switch…
Answer this question and get it marked →A student investigates the oscillations (swings) of a pendulum. A pendulum consists of a bob supported by thin thread or string. The period T of a pendulum is the time taken for…
Answer this question and get it marked →October–November 2024, Paper 63
A student investigates the movement of water into and out of plant cells by osmosis. The student uses potato tissue and sugar solution. Procedure: the student prepares five large…
Answer this question and get it marked →A student tests potato and apple for their nutrient content using Benedict's solution, biuret solution and iodine solution. The potato tests positive with the iodine solution and…
Answer this question and get it marked →A student investigates the composition of air. When air is heated in air it reacts with oxygen and removes oxygen from the air. Procedure: the student pulls some air into a…
Answer this question and get it marked →Rust is a brown solid that forms on the surface of iron. At first, the brown solid cannot be seen with the eye. The rusting of iron in salt water is detected using indicator X.…
Answer this question and get it marked →A student measures the focal length of a converging lens. The student assembles the apparatus as shown in Fig. 5.1 (a lamp, an illuminated object, a converging lens in a lens…
Answer this question and get it marked →A student investigates the rate of cooling of water. The student assembles the apparatus shown in Fig. 6.1 (a thermometer in a beaker of hot water, held by a stand). Procedure:…
Answer this question and get it marked →May–June 2023, Paper 51
You investigate the use of an enzyme for extracting juice from apples. Apple puree is treated with enzyme solution (beaker A) or warm water (beaker B), then filtered into…
Answer this question and get it marked →You test some of the apple juice from Question 1 for its nutrient content. Test 1 cm depth of apple juice with Benedict's solution in a hot water-bath for 3 minutes; test another…
Answer this question and get it marked →You investigate the rate of reaction between solutions K and H. When K, H and starch are mixed, a blue-black colour appears after a time. Experiment 1: add 10 cm3 K, 5 drops…
Answer this question and get it marked →Aqueous hydrogen peroxide breaks down slowly into water and oxygen gas; manganese(IV) oxide is a catalyst. The reaction is too fast to count the bubbles of gas formed. Plan an…
Answer this question and get it marked →You investigate the stretching of a spring (Fig. 5.1, spring hung from a clamp with a metre rule). Take readings from the metre rule of the top and the bottom of the coiled part…
Answer this question and get it marked →You investigate the cooling of hot water in a beaker. Pour 200 cm3 of hot water into the beaker, place the thermometer in, wait 30 seconds, then measure the initial temperature T.…
Answer this question and get it marked →May–June 2023, Paper 52
You investigate the effect of plants and animals on their aqueous environment. A sample of water W is provided. Add a few drops of hydrogencarbonate indicator to the sample of…
Answer this question and get it marked →You investigate three nutrient solutions D, E and F. Add about 1 cm depth of Benedict's solution to each test-tube D, E and F and place them in a hot water-bath for at least 3…
Answer this question and get it marked →The seeds of a sycamore tree have 'wings' to help carry them in the wind. Plan an investigation to determine the relationship between the vertical height the seeds fall from and…
Answer this question and get it marked →You investigate the rate of reaction between solutions H and K. When H, K and starch are mixed, a blue-black colour appears after a time. Procedure: add 4 cm3 of solution H to a…
Answer this question and get it marked →You identify solution L and solution M. Add 2 cm depth of each solution into four test-tubes and carry out the tests in Table 5.1, recording observations for L and M: add a few…
Answer this question and get it marked →You measure the mass M of an object using a balancing method. The object is fixed with its centre over the 15.0 cm mark. Place the pivot directly under the 50.0 cm mark, place a…
Answer this question and get it marked →You investigate the image formed by a convex lens (Fig. 7.1: lamp, illuminated object, convex lens in holder, screen; object distance u, image distance v). Place the lens a…
Answer this question and get it marked →May–June 2023, Paper 53
You are provided with a flower. Remove three petals from one side of the flower so that the internal structures are clearly visible. In the box, make a large and detailed pencil…
Answer this question and get it marked →You investigate the action of three concentrations of an enzyme on milk protein. Milk looks white (opaque); when the protein is broken down it becomes clear. Add 5 cm3 of 4%…
Answer this question and get it marked →You investigate the rate of reaction between solution H and solution K. When H, K and starch are mixed, a blue-black colour appears after a time. Procedure: add 2 cm3 of solution…
Answer this question and get it marked →You identify solution L. Add about 3 cm depth of solution L into each of four test-tubes and carry out the tests in Table 4.1, recording observations: test-tube 1 – add a few…
Answer this question and get it marked →You measure the density of plasticine by two methods. Method 1: break the plasticine into two pieces of approximately the same size; put one aside for (d). Use the balance to find…
Answer this question and get it marked →Plan an investigation to find out if the material from which a spring is made affects the extension of the spring when it is stretched by a load. You are provided with springs…
Answer this question and get it marked →May–June 2023, Paper 61
A student investigates the use of an enzyme for extracting juice from apples. Apple puree is treated with enzyme solution (beaker A) or water (beaker B), stirred, left in a warm…
Answer this question and get it marked →The student tests apple juice for nutrient content. The apple juice tests positive with Benedict's solution and negative with biuret solution. Record in Table 2.1 the final…
Answer this question and get it marked →A student investigates the rate of reaction between solutions H and K (with starch, blue-black colour appears after a time). Experiment 1: 10 cm3 H, 5 drops starch, 2 cm3…
Answer this question and get it marked →Aqueous hydrogen peroxide breaks down slowly into water and oxygen gas; manganese(IV) oxide is a catalyst. The reaction is too fast to count the bubbles of gas formed. Plan an…
Answer this question and get it marked →A student investigates the stretching of a spring (Fig. 5.1). Fig. 5.2 shows a full-size diagram of the unstretched spring and part of the metre rule (scale 32–36 cm). Take…
Answer this question and get it marked →A student investigates the cooling of hot water in a beaker. Room temperature is 22.0 °C; 200 cm3 of hot water is poured into a beaker, a thermometer placed in, wait 30 s, stir…
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. Three beakers are set up: A (water W and fish only), B (water W and plants only), C (water W…
Answer this question and get it marked →A student investigates three nutrient solutions D, E and F for reducing sugar. Add 2 cm3 of Benedict's solution to each and place in a hot water-bath for 3 minutes. The student…
Answer this question and get it marked →The seeds of a sycamore tree have 'wings' to help carry them in the wind. Plan an investigation to determine the relationship between the vertical height the seeds fall from and…
Answer this question and get it marked →A student investigates the rate of reaction between solutions H and K (with starch, blue-black appears after a time). Procedure: add 4 cm3 of H, 5 drops starch, 10 cm3 of K, swirl…
Answer this question and get it marked →A student identifies the ions in solutions L and M. Table 5.1 (cation tests): add a few drops of aqueous sodium hydroxide – L no ppt, M no ppt; add excess aqueous sodium hydroxide…
Answer this question and get it marked →A student measures the mass M of an object using a balancing method. The object is fixed with its centre over the 15.0 cm mark, the pivot under the 50.0 cm mark, and an 80 g mass…
Answer this question and get it marked →A student investigates the image formed by a convex lens (Fig. 7.1: lamp, illuminated object, convex lens in holder, screen; image distance y). The lens is placed u = 20.0 cm in…
Answer this question and get it marked →May–June 2023, Paper 63
Fig. 1.1 shows a photograph of a flower with points A and B marked. In the box, make a large and detailed pencil drawing of the flower. Include the internal parts of the flower.
Answer this question and get it marked →A student investigates the action of three concentrations of an enzyme on milk protein. Milk looks white (opaque); when the protein is broken down it becomes clear. The student…
Answer this question and get it marked →A student investigates the rate of reaction between solution H and solution K (with starch, blue-black appears after a time). Procedure: 2 cm3 H, 8 cm3 distilled water, 5 drops…
Answer this question and get it marked →A student does a series of tests to identify solution L. Solution L gives: a white precipitate with both a few drops and excess aqueous sodium hydroxide; a colourless solution…
Answer this question and get it marked →A student measures the density of plasticine by two methods. Method 1: place a piece of plasticine on a top-pan balance and record the mass m. Fig. 5.1 shows the reading (84.6 g).…
Answer this question and get it marked →Plan an investigation to find out if the material from which a spring is made affects the extension of the spring when it is stretched by a load. You are provided with springs…
Answer this question and get it marked →October–November 2023, Paper 31
A cyclist is riding a bicycle around a circular track. The length of the track is 400 m. The cyclist completes five laps of the track. The time taken for each lap is measured and…
Answer this question and get it marked →October–November 2023, Paper 51
You are going to test milk and rice for their nutrient content. In order to test the rice, water has been added and it is in a beaker labelled 'rice water'. Read through the…
Answer this question and get it marked →Fig. 2.1 shows a photomicrograph of a single celled organism called Euglena, with points A and B marking the length of the cell. In the box below, make a large detailed pencil…
Answer this question and get it marked →You are going to investigate the effect of light on three silver salts. Procedure: Put approximately 1 cm depth of aqueous potassium chloride into a clean test-tube. Add…
Answer this question and get it marked →You are going to investigate the neutralisation of dilute hydrochloric acid with aqueous sodium hydroxide. The neutralisation reaction is exothermic; thermal energy is given out…
Answer this question and get it marked →You are going to investigate the resistance of different lamp combinations. The circuit shown in Fig. 5.1 has been set up for you (circuit 1, with ammeter A and points X and Y).…
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 →October–November 2023, Paper 52
You are going to test milk and rice for their nutrient content. In order to test the rice, water has been added and it is in a beaker labelled 'rice water'. Read through the…
Answer this question and get it marked →Fig. 2.1 shows a photomicrograph of a single celled organism called Euglena, with points A and B marking the length of the cell. In the box below, make a large detailed pencil…
Answer this question and get it marked →You are going to investigate the effect of light on three silver salts. Procedure: Put approximately 1 cm depth of aqueous potassium chloride into a clean test-tube. Add…
Answer this question and get it marked →You are going to investigate the neutralisation of dilute hydrochloric acid with aqueous sodium hydroxide. The neutralisation reaction is exothermic; thermal energy is given out…
Answer this question and get it marked →You are going to investigate the resistance of different lamp combinations. The circuit shown in Fig. 5.1 has been set up for you (circuit 1, with ammeter A and points X and Y).…
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 →October–November 2023, Paper 53
You are going to investigate an enzyme controlled reaction. An enzyme found inside living cells of some plants catalyses the breakdown of hydrogen peroxide releasing oxygen gas.…
Answer this question and get it marked →Amylase is a digestive enzyme that breaks down starch into sugars. The presence of starch in a solution is confirmed by adding iodine solution. When starch is present, the iodine…
Answer this question and get it marked →You are going to determine the percentage purity of a sample of compound F and identify the ions it contains. When compound F is heated it decreases in mass because it gives off a…
Answer this question and get it marked →You are going to investigate the oscillations of a simple pendulum. The period of a pendulum is the time for one complete oscillation. The pendulum is set up as shown in Fig. 4.2…
Answer this question and get it marked →You are going to investigate the cooling of hot water in two beakers, P and Q. Both insulation and a lid each reduce the loss of thermal energy. Beaker P has a layer of insulation…
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 in a beaker, leaves the mixture for 5 minutes, stirs it, then carefully…
Answer this question and get it marked →Fig. 2.1 shows a photomicrograph of a single-celled organism called Euglena, with points A and B marking the length of the cell. In the box below, make a large, detailed pencil…
Answer this question and get it marked →A student investigates the neutralisation of dilute hydrochloric acid with aqueous sodium hydroxide. The reaction is exothermic; thermal energy is given out and the temperature…
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. The student sets up the circuit shown in Fig. 5.1 (circuit 1, with ammeter A and points X and Y). On Fig.…
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 →October–November 2023, Paper 62
A student investigates how small animals respond to the presence of light and water vapour. The student uses a choice chamber (dish with a lid) divided into four areas: dry and…
Answer this question and get it marked →A student investigates the movement of molecules through a partially permeable membrane. The membrane allows small molecules such as water to pass through but not large molecules…
Answer this question and get it marked →A student investigates the thermal energy released when alcohols burn. Procedure: measure 100 cm3 of water into a beaker, measure its initial temperature, put methanol into a…
Answer this question and get it marked →When sodium carbonate solid reacts with dilute hydrochloric acid it makes carbon dioxide gas. When the carbon dioxide gas made is bubbled into a detergent the bubbles make a foam.…
Answer this question and get it marked →A student investigates the image formed by a converging lens. Procedure: places a screen at d = 80.0 cm from an illuminated object, switches on a lamp and places a converging lens…
Answer this question and get it marked →A student investigates whether two resistance wires X and Y are made from the same metal. X and Y have the same thickness but different lengths. Procedure: the student sets up the…
Answer this question and get it marked →October–November 2023, Paper 63
A student investigates an enzyme-controlled reaction. An enzyme found inside living cells of some plants catalyses the breakdown of hydrogen peroxide, releasing oxygen gas, which…
Answer this question and get it marked →Amylase is a digestive enzyme that breaks down starch into sugars. The presence of starch in a solution is confirmed by adding iodine solution. When starch is present, the iodine…
Answer this question and get it marked →A student determines the percentage purity of a sample of compound F and identifies the ions it contains. When compound F is heated it decreases in mass as it gives off a gas.…
Answer this question and get it marked →A student investigates the oscillations of a simple pendulum. The student sets up a pendulum as shown in Fig. 4.1 (clamp on a stand, length l from the point of support to the…
Answer this question and get it marked →A student investigates the cooling of hot water in two beakers, P and Q. Beaker P has a layer of insulation but no lid; beaker Q has a lid but no insulation. Procedure: measure…
Answer this question and get it marked →Other IGCSE Sciences - Co-Ordinated topics
- Motion, forces and energy (41)
- Organic chemistry (16)
- Electricity and magnetism (15)
- Waves (14)
- Reproduction (13)
- Nuclear physics (13)
- Coordination and response (12)
- Organisms and their environment (12)
- Metals (11)
- Atoms, elements and compounds (10)
- Stoichiometry (9)
- Thermal physics (9)