IGCSE Science - Combined (0653) — October–November 2023, Paper 11
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →The diagram shows a plant absorbing carbon dioxide in order to carry out photosynthesis. carbon dioxide Which characteristic of all living organisms is this? A movement B…
Answer this question and get it marked →What is diffusion? A net movement of molecules down a concentration gradient B net movement of molecules up a concentration gradient C total movement of molecules down a…
Answer this question and get it marked →What is glycogen made up from? A amino acids B fatty acids C glucose D glycerol
Answer this question and get it marked →Chlamydomonas nivalis is a single-celled organism that lives in snow and ice. At which temperature will its enzymes work best? A 60 °C B 40 °C C 0 °C D –20 °C
Answer this question and get it marked →What is the correct definition of a balanced diet? A a diet in which all the components needed to maintain health are present in appropriate proportions B a diet which contains…
Answer this question and get it marked →Digestion can be defined as the breakdown of A large insoluble molecules to small soluble molecules. B small insoluble molecules to large soluble molecules. C large soluble…
Answer this question and get it marked →By which process does water vapour move out of plant leaves through stomata? A diffusion B evaporation C osmosis D respiration
Answer this question and get it marked →Which chemical is used to test for carbon dioxide in expired air? A Benedict’s solution B distilled water C iodine solution D limewater
Answer this question and get it marked →The diagram shows a plant in a pot fixed to the side of a light-proof box. What is shown by the stem of the plant? gravitropism phototropism A ✓ ✓ B ✓ ✗ C ✗ ✓ D ✗ ✗
Answer this question and get it marked →Which row is correct for sexual reproduction? genetically different one zygote offspring produced parent produced A ✓ ✓ ✗ B ✓ ✗ ✓ C ✗ ✓ ✗ D ✗ ✗ ✓
Answer this question and get it marked →What is the correct route of sperm cells from where they are produced to leaving the body? A prostate gland → sperm ducts → urethra B prostate gland → testes → sperm ducts C…
Answer this question and get it marked →Which type of organism makes glucose using energy from sunlight? A carnivore B consumer C herbivore D producer
Answer this question and get it marked →The diagram represents part of the carbon cycle. atmospheric green plants carbon dioxide animals decomposers Which arrows show where respiration takes place? A 1, 3 and 4 B 1 and…
Answer this question and get it marked →Which substance is liquid at 25 °C? melting point boiling point / °C / °C A –182 –161 B –100 80 C –77 –34 D 44 280
Answer this question and get it marked →A solid is added to a liquid and stirred until the solid is no longer visible. Which word describes the type of mixture that is formed? A concentration B solute C solution D…
Answer this question and get it marked →A compound contains twice as many atoms of caesium, Cs, as atoms of carbon. The compound contains three times as many atoms of oxygen as atoms of carbon. What is the formula of…
Answer this question and get it marked →Which process is endothermic? A boiling water B burning wood C freezing water D neutralising an acid with a base
Answer this question and get it marked →A gas is given off during a reaction. The volume of the gas is measured as it is collected. Some of the apparatus used is shown. X reaction mixture Which piece of apparatus is…
Answer this question and get it marked →Magnesium ribbon reacts with steam. The equation for the reaction is shown. Mg + H2O → MgO + H2 Which substance is being reduced in this reaction? A H2 B H2O C Mg D MgO
Answer this question and get it marked →Calcium oxide is added to water containing universal indicator. The universal indicator turns blue. What is the pH of the solution? A 1 B 6 C 7 D 11
Answer this question and get it marked →Acid X reacts with metal Y. A colourless gas is given off and a pale green solution is produced. Two tests are carried out on the solution. test reagents added result 1 aqueous…
Answer this question and get it marked →Which statement describes the elements across the Periodic Table from left to right? A Their atoms contain fewer protons. B Their atoms contain the same number of electrons. C…
Answer this question and get it marked →Read the sentences about calcium, copper and bromine. Calcium, copper and bromine are in the same period of the Periodic Table. The metals react with bromine to form calcium…
Answer this question and get it marked →Which statements about metals and their compounds are correct? 1 Copper reacts with dilute hydrochloric acid to give hydrogen. 2 Carbon does not react with aluminium oxide. 3…
Answer this question and get it marked →Which statement about carbon dioxide is not correct? A Carbon dioxide is formed when calcium carbonate is heated. B Carbon dioxide is used up during respiration. C Clean air…
Answer this question and get it marked →Which statement about alkanes is correct? A Their molecules are unsaturated. B They are generally reactive compounds. C They are mixtures of carbon and hydrogen atoms only. D They…
Answer this question and get it marked →Which process is used to make poly(ethene)? A addition polymerisation B cracking C fractional distillation D reacting ethane molecules together
Answer this question and get it marked →Which speed–time graph represents motion for which the acceleration is constant but not zero? A B speed speed 0 0 0 time 0 time C D speed speed 0 0 0 time 0 time
Answer this question and get it marked →A glass block has a mass of 30 g and a volume of 15 cm3. What is the density of the glass? A 0.50 g / cm3 B 2.0 g / cm3 C 15 g / cm3 D 450 g / cm3
Answer this question and get it marked →Which property of an object cannot be changed by a force? A mass B motion C shape D size
Answer this question and get it marked →A car on a journey travels along a horizontal road at a constant speed of 50 km / h. Which description of the forces acting on the car during this journey is correct? driving…
Answer this question and get it marked →A man lifts a heavy load vertically, from the ground to above his head. load He then moves the load horizontally at constant speed. During which motion is work done on the load,…
Answer this question and get it marked →A girl watches a man hammering a post into the ground. When she sees the hammer hit the post, she starts a stop-watch. When she hears the sound of the hammer hitting the post, she…
Answer this question and get it marked →The molecules in a substance are close together but free to change positions with each other. Which substance at 20 °C matches this description? A air B copper C iron D water
Answer this question and get it marked →The diagram shows four rods made of different metals: brass, copper, iron and silver. The rods have identical dimensions and all start at the same temperature. A metal ball is…
Answer this question and get it marked →The diagram shows light incident on a plane mirror. Which labelled angle is the angle of reflection? D A plane mirror C B ray of incident light normal
Answer this question and get it marked →The amplitude of a sound wave decreases and its frequency increases. What happens to the sound heard? A It becomes louder and its pitch becomes higher. B It becomes louder and its…
Answer this question and get it marked →Which circuit is used to measure the current in the lamp and the potential difference (p.d.) across it? A B A V V A C D V V A A
Answer this question and get it marked →An electric heater has a resistance of 50 Ω. It is connected to a power supply with a potential difference (p.d.) of 240 V. What is the current in the heater? A 0.21 A B 4.8 A C…
Answer this question and get it marked →Which symbol is used to represent a fixed resistor in an electrical circuit? A B C D reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if…
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