IGCSE Science - Combined (0653) — May–June 2025, Paper 11
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →What are characteristics of all living organisms? A excretion, breathing and sensitivity B gas exchange and muscle contraction C movement, excretion and respiration D muscle…
Answer this question and get it marked →The diagram of a leaf is 40 mm long from X-Y. The diagram is labelled 'magnification x10'. What is the actual length of the leaf? A 0.25 mm B 2.5 mm C 4 mm D 400 mm
Answer this question and get it marked →Which substance moves through a partially permeable membrane by osmosis? A amino acids B oxygen C sugar D water
Answer this question and get it marked →Which small molecules join together to form large oil molecules? A amino acids and glucose B amino acids and glycerol C fatty acids and glucose D fatty acids and glycerol
Answer this question and get it marked →Enzymes are ......Z...... that function as biological catalysts. What is Z? A fats B proteins C sugars D vitamins
Answer this question and get it marked →The diagrams show four identical, well-watered plants in different environments. Each apparatus initially contains atmospheric air. Which plant will produce the most oxygen? A…
Answer this question and get it marked →Which part of a leaf of a dicotyledonous plant contains chloroplasts? A cuticle B palisade mesophyll C phloem D stomata
Answer this question and get it marked →What is important for healthy teeth? A carbohydrates B fibre C iron D vitamin D
Answer this question and get it marked →The diagram shows a cross-section of the stem of a dicotyledonous plant. Four structures around a ring of vascular bundles are labelled A, B, C and D. Which label shows the tissue…
Answer this question and get it marked →Aerobic respiration is described as the chemical reactions in cells that use ......1...... to break down ......2...... molecules to release ......3...... . Which words complete…
Answer this question and get it marked →What is the function of the sepals in most insect-pollinated plants? A to attract insects B to make nectar C to make pollen D to protect flower buds
Answer this question and get it marked →The diagram shows dishes containing the same type of seeds in different conditions. Each dish is placed in atmospheric air and at a temperature suitable for germination. Dish 1:…
Answer this question and get it marked →What are undesirable effects of deforestation? 1 extinction of species 2 flooding 3 loss of soil 4 an increase of carbon dioxide in the atmosphere A 1, 2, 3 and 4 B 1 and 4 only C…
Answer this question and get it marked →Which diagram represents a mixture of two different elements? Each diagram is a box containing circular particles, some open (white) and some filled (black). A mixture of two…
Answer this question and get it marked →Potassium and iodine react together to form potassium iodide, KI. Which statement is correct? A Ionic bonds form between neutral ions. B The potassium and iodine atoms share a…
Answer this question and get it marked →The unbalanced equation for the reaction between aqueous sodium hydroxide and dilute sulfuric acid is shown. wNaOH + xH2SO4 - yNa2SO4 + zH2O Which values of w, x, y and z balance…
Answer this question and get it marked →The diagram shows electrolysis apparatus. A cell (labelled A) is connected to two electrodes dipping into a liquid electrolyte. The electrode connected to the positive terminal is…
Answer this question and get it marked →The initial temperature of a sample of water is measured. Ammonium nitrate is mixed with the water. The final temperature is measured. The diagram shows the thermometer readings.…
Answer this question and get it marked →The evaporation of ethanol is an example of a ......1...... change because ......2...... . Which words complete gaps 1 and 2? 1 2 --- --- --- A chemical a gas is produced B…
Answer this question and get it marked →Magnesium is added to excess dilute hydrochloric acid. The equation for the reaction is shown. Mg(s) + 2HCl(aq) - MgCl2(aq) + H2(g) Which change in conditions increases the rate…
Answer this question and get it marked →Which description explains why a reaction involves reduction? A mass decreases B oxygen is lost C pH decreases D temperature decreases
Answer this question and get it marked →Which number determines the order of elements in the Periodic Table? A neutron number B nucleon number C proton number D relative atomic mass
Answer this question and get it marked →Which statements about transition elements are correct? 1 They are in Group I of the Periodic Table. 2 They form coloured compounds. 3 They often act as catalysts. 4 They have low…
Answer this question and get it marked →Which statement explains why aluminium is extracted from its ore by electrolysis and not by heating with carbon? A Aluminium is more reactive than carbon. B Aluminium is more…
Answer this question and get it marked →Which piece of apparatus is used to measure exactly 20.6 cm^3 of water? A measuring cylinder B burette C graduated beaker D syringe
Answer this question and get it marked →Chromatography separates ink into different colours. Which diagram shows how the apparatus is set up? A beaker with paper hanging fully inside, ink spot on the paper above the…
Answer this question and get it marked →Excess solid zinc carbonate is added to dilute hydrochloric acid in a beaker. When the reaction is complete, the beaker contains a mixture of unreacted solid zinc carbonate in a…
Answer this question and get it marked →A student determines the density of a small, irregularly shaped rock. Which apparatus does the student use? A balance, measuring cylinder and ruler B balance and measuring…
Answer this question and get it marked →The same object is moved using four different sets of conditions. The force used, the time taken and the distance moved are measured for each set of conditions. Which row shows…
Answer this question and get it marked →A metal plate is 3.0 m long and 2.0 m wide. The metal plate has a weight of 30 N and rests on the ground. Which pressure does the metal plate exert on the ground? A 5.0 Pa B 6.0…
Answer this question and get it marked →A bowl contains warm water. The water evaporates. Which row describes where the evaporation occurs and the effect of the evaporation on the temperature of the remaining water?…
Answer this question and get it marked →The shiny metal handlebars of a bicycle have black plastic hand grips. On a cold day, the shiny metal handlebars feel colder than the black plastic hand grips. Which statement…
Answer this question and get it marked →How is thermal energy transferred by convection in a liquid? A by the loss of more energetic particles from the surface of the liquid B by a flow of particles of the liquid C by…
Answer this question and get it marked →The diagram shows part of a wave. Two points are labelled X and Y. There are four wavelengths between X and Y. In 2.0 s, all four wavelengths pass point Y. What is the frequency…
Answer this question and get it marked →The diagram shows a ray of light reflected by a plane mirror. Four angles, w, x, y and z, are labelled. Two lines, P and Q, are labelled. P is the dashed line perpendicular to the…
Answer this question and get it marked →An astronaut is outside a space station in the vacuum of space. The astronaut is wearing a spacesuit. A second astronaut is inside the space station. This astronaut makes a…
Answer this question and get it marked →An electrical device has a label with the information shown. 50 W, 1100 ohm, 230 V Which information does the label provide? A current, power and resistance B current, power and…
Answer this question and get it marked →Which equation relates the resistance R of a resistor to the current I in the resistor and the voltage V across the resistor? A R = I / V B R = I V C R = 1 / (I V) D R = V / I
Answer this question and get it marked →Which electrical device is used to protect a circuit? A ammeter B battery C fuse D voltmeter
Answer this question and get it marked →What is a description of the Sun and what does the Sun mostly consist of? description mostly consists of --- --- --- A small mass star hydrogen and helium B small mass star…
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