Cambridge IGCSE Sciences - Co-ordinated (Double) 0654 — 2022 May/June Paper 2 · Variant 2
0654/22/M/J/22 · 40 questions · 40 marks · ≈45 min
The question paper and its mark scheme, free to read here and free to download. This is Cambridge’s own paper, exactly as it was sat.
Question paper16 pages
Mark scheme3 pages
Answers below. Sit the paper first if you are practising.
Questions as text
Q1 · Which statement about the characteristics of living organisms is correct?
1 Which statement about the characteristics of living organisms is correct? A Excretion is the chemical reactions in cells that release energy. B Nutrition is the taking in of materials for energy, growth and development. C Respiration is the process that makes more of the same kind. D Sensitivity is the removal of toxic materials and excess substances.
Mark scheme: B
Q2 · Which statement about cells is correct?
2 Which statement about cells is correct? A Cell membranes are found only in animal cells. B Cell membranes are found only in plant cells. C Cell walls are found only in animal cells. D Cell walls are found only in plant cells.
Mark scheme: D
Q3 · Which reagent is used to test for the presence of protein in a food sample?
3 Which reagent is used to test for the presence of protein in a food sample? A Benedict’s solution B biuret C ethanol D iodine
Mark scheme: B
Q4 · Which effect will temperature change have on enzyme activity?
4 Which effect will temperature change have on enzyme activity? A High temperatures will denature them, making it difficult for substrate molecules to fit in the active site. B High temperatures will denature them, making it easy for substrate molecules to fit in the active site. C Low temperatures will denature them, making it difficult for substrate molecules to fit in the active site. D Low temperatures will denature them, making it easy for substrate molecules to fit in the active site.
Mark scheme: A
Q5 · Which graph shows the effect of light intensity on the rate of photosynthesis, if all…
5 Which graph shows the effect of light intensity on the rate of photosynthesis, if all other factors are kept constant? A B rate of rate of photosynthesis photosynthesis 0 0 0 light intensity 0 light intensity C D rate of rate of photosynthesis photosynthesis 0 0 0 light intensity 0 light intensity
Mark scheme: D
Q6 · The diagram shows part of the digestive system
6 The diagram shows part of the digestive system. P Q R S Which labelled parts produce digestive enzymes, absorb water and store bile? produce digestive absorb water store bile enzymes A P Q R B Q R P C R S P D S P R
Mark scheme: C
Q7 · The table shows the blood pressures in the left ventricle and aorta at various times in a…
7 The table shows the blood pressures in the left ventricle and aorta at various times in a cardiac cycle. Which row shows the blood pressures when blood starts to leave the heart? pressure in left ventricle pressure in aorta / arbitrary units / arbitrary units A 3.0 12.0 B 6.2 6.2 C 16.0 10.0 D 18.0 20.3
Mark scheme: C
Q8 · Which component of tobacco smoke reduces the amount of oxygen that red blood cells can…
8 Which component of tobacco smoke reduces the amount of oxygen that red blood cells can carry to the cells of the body? A carbon dioxide B carbon monoxide C nicotine D tar
Mark scheme: B
Q9 · A person who is red-green colour blind cannot distinguish between red and green colours
9 A person who is red-green colour blind cannot distinguish between red and green colours. Which part of the eye is responsible for this? A cornea B iris C lens D retina
Mark scheme: D
Q10 · Which statement gives an advantage of sexual reproduction over asexual reproduction?
10 Which statement gives an advantage of sexual reproduction over asexual reproduction? A The offspring are genetically different and therefore it is more likely that some can adapt to a changing environment. B The offspring are genetically different so all can adapt to a changing environment. C The offspring are genetically identical and therefore it is more likely that some can adapt to a changing environment. D The offspring are genetically identical so all can adapt to a changing environment.
Mark scheme: A
Q11 · Selection in chickens has produced individuals that lay more eggs per week
11 Selection in chickens has produced individuals that lay more eggs per week. What is required for this to occur? reproduction selection A asexual human B asexual natural C sexual human D sexual natural
Mark scheme: C
Q12 · Which organisms obtain energy directly from every trophic level?
12 Which organisms obtain energy directly from every trophic level? A carnivores B decomposers C herbivores D producers
Mark scheme: B
Q13 · When fertiliser is washed into lakes, it leads to changes in the oxygen concentration and…
13 When fertiliser is washed into lakes, it leads to changes in the oxygen concentration and the population of algae. algae oxygen time Which statement explains the change in oxygen over time? A The algae use up the oxygen for photosynthesis. B Decomposer bacteria use up the oxygen for respiration. C Nitrates react with the oxygen. D The algae use up the oxygen for respiration.
Mark scheme: B
Q14 · Which piece of apparatus is used to measure the change in the volume of a liquid most…
14 Which piece of apparatus is used to measure the change in the volume of a liquid most accurately? A B C D
Mark scheme: C
Q15 · Some physical and chemical changes are listed
15 Some physical and chemical changes are listed. 1 burning methane 2 dissolving sugar in water 3 evaporating ethanol 4 rusting iron Which changes are chemical changes? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4
Mark scheme: B
Q16 · Sodium phosphate, Na3PO4, contains sodium ions, Na+
16 Sodium phosphate, Na3PO4, contains sodium ions, Na+. Aluminium sulfate, Al 2(SO4)3, contains sulfate ions, SO4 2–. What is the formula of aluminium phosphate? A Al PO4 B Al (PO4)2 C Al 2(PO4)3 D Al 3(PO4)2
Mark scheme: A
Q17 · Which statement about electrolysis is correct?
17 Which statement about electrolysis is correct? A At the anode, anions are oxidised by gaining electrons. B At the anode, cations are reduced by gaining electrons. C At the cathode, anions are oxidised by gaining electrons. D At the cathode, cations are reduced by gaining electrons.
Mark scheme: D
Q18 · In which equation is the underlined substance reduced?
18 In which equation is the underlined substance reduced? A Cl 2 + 2KBr 2KCl + Br2 B 2Mg + O2 2MgO C 2PbO + C CO2 + 2Pb D Zn + CuSO4 Cu + ZnSO4
Mark scheme: A
Q19 · When aqueous potassium hydroxide is warmed with ammonium chloride, a gas is given off
19 When aqueous potassium hydroxide is warmed with ammonium chloride, a gas is given off. Which test result identifies the gas? A It bleaches pH paper. B It turns anhydrous cobalt(II) chloride blue. C It turns universal indicator red. D It turns red litmus blue.
Mark scheme: D
Q20 · A gas is used in welding metals together at high temperatures
20 A gas is used in welding metals together at high temperatures. The gas is used to provide an inert atmosphere. What is the gas? A argon B carbon dioxide C fluorine D oxygen
Mark scheme: A
Q21 · Which row does not link a general physical property to the type of element?
21 Which row does not link a general physical property to the type of element? type of element general physical property A metal malleable B metal thermal conductor C non-metal electrical conductor D non-metal low melting point
Mark scheme: C
Q22 · Carbon is below aluminium but above zinc in the reactivity series
22 Carbon is below aluminium but above zinc in the reactivity series. Iron is below zinc in the reactivity series. Which statements are correct? 1 Carbon can be used to extract aluminium and iron from their ores. 2 Aluminium can be used to extract zinc and iron from their ores. 3 Carbon can be used to extract zinc and iron from their ores. 4 Zinc can be used to extract aluminium and iron from their ores. A 1 and 2 B 1 and 3 C 2 and 3 D 3 and 4
Mark scheme: C
Q23 · Gases from a car engine travel through a catalytic converter and out through the exhaust
23 Gases from a car engine travel through a catalytic converter and out through the exhaust. Some of the gases going into the converter are listed. 1 carbon dioxide 2 carbon monoxide 3 nitrogen 4 nitrogen monoxide Which gases increase in quantity in the catalytic converter? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4
Mark scheme: A
Q24 · Which reaction in the Contact process is endothermic?
24 Which reaction in the Contact process is endothermic? A S + O2 SO2 B 2SO2 + O2 2SO3 C SO3 + H2SO4 H2S2O7 D H2S2O7 + H2O 2H2SO4
Mark scheme: B
Q25 · Why do farmers add limestone to soil?
25 Why do farmers add limestone to soil? A It acts as a fertiliser. B It adds nitrogen to the soil. C It decreases the pH of the soil. D It increases the pH of the soil.
Mark scheme: D
More questions on The characteristic properties of acids and bases
Q26 · Which row describes the hydrocarbon CH3CHCH2?
26 Which row describes the hydrocarbon CH3CHCH2? homologous series general formula A alkane CnH2n+2 B alkane CnH2n C alkene CnH2n+2 D alkene CnH2n
Mark scheme: D
Q27 · The structure of a monomer is shown
27 The structure of a monomer is shown. H3C CH2CH3 C C H H Which diagram represents the structure of the polymer formed from this monomer by addition polymerisation? A B H H H H H CH3 CH2CH3 CH3 CH2CH3 C C C C C C C C C H H H H H H H H H C D CH3 CH3 CH3 CH3 H CH2CH3 H CH2CH3 C C C C C C C C CH3 H CH3 H H CH3 H CH3
Mark scheme: B
Q28 · A spring is extended by a force but the spring does not pass its limit of proportionality
28 A spring is extended by a force but the spring does not pass its limit of proportionality. Which expression is equal to the spring constant? force A extension of the spring force B length of the spring extension of the spring C force length of the spring D force
Mark scheme: A
Q29 · A force of 10 N is applied to a piston of area 0.10 m2, causing a pressure
29 A force of 10 N is applied to a piston of area 0.10 m2, causing a pressure. This pressure is transmitted through a fluid to a piston of area 2.0 m2. What is the force on this piston? A 2.0 N B 20 N C 200 N D 2000 N
Mark scheme: C
Q30 · An object moving at speed v has kinetic energy E
30 An object moving at speed v has kinetic energy E. What is the speed of the object when its kinetic energy is 4.0 E ? A 0.25 v B 2.0 v C 4.0 v D 16 v
Mark scheme: B
Q31 · The power input to a power station is 800 MW
31 The power input to a power station is 800 MW. The useful electrical power output is 320 MW. What is the efficiency of the power station? A 0.40% B 2.5% C 40% D 250%
Mark scheme: C
Q32 · What happens to the temperature of a substance as it is melting and as it is boiling?
32 What happens to the temperature of a substance as it is melting and as it is boiling? melting boiling A decreases increases B decreases no change C increases increases D no change no change
Mark scheme: D
Q33 · Solid metals transfer thermal energy by conduction
33 Solid metals transfer thermal energy by conduction. Which conduction process occurs only in metals? A Atoms move freely through the solid and carry energy. B Atoms vibrate about fixed positions and pass energy to neighbouring atoms. C Electrons move freely through the solid and carry energy. D Electrons vibrate about fixed positions and pass energy to neighbouring electrons.
Mark scheme: C
Q34 · Light enters a glass block at an angle of incidence of 41
34 Light enters a glass block at an angle of incidence of 41. The light bends toward the normal. The angle between the refracted ray and the glass-air boundary is 62. glass 62° air 41° Which expression is equal to the refractive index of the glass? sin 41 sin 41 sin 49 sin 49 A B C D sin 28 sin 62 sin 28 sin 62
Mark scheme: A
Q35 · Which statement about the electromagnetic spectrum is correct?
35 Which statement about the electromagnetic spectrum is correct? A Gamma-radiation has a lower frequency than visible light. B Infrared radiation has a higher frequency than radio waves. C Microwaves have a smaller wavelength than ultraviolet radiation. D X-rays have a larger wavelength than visible light.
Mark scheme: B
Q36 · A student rubs a balloon against her hair
36 A student rubs a balloon against her hair. Electrons are transferred from the hair onto the balloon, and the hair and the balloon both become charged. The hair is now attracted to the balloon. Which row shows the charges on the hair and on the balloon after rubbing? charge on hair charge on balloon A negative negative B negative positive C positive negative D positive positive
Mark scheme: C
Q37 · Which row shows how lamps are connected in a lighting circuit in a house and gives an…
37 Which row shows how lamps are connected in a lighting circuit in a house and gives an advantage of connecting them in this way? how lamps are advantage of connecting connected them in this way A in parallel they can be switched separately B in parallel they share the voltage C in series they can be switched separately D in series they share the voltage
Mark scheme: A
Q38 · A transformer increases the voltage from a power station in order to transfer electricity…
38 A transformer increases the voltage from a power station in order to transfer electricity along transmission cables. How does increasing the voltage affect the current in the cables and how does it affect the efficiency of energy transfer? current efficiency A decreases decreases B decreases increases C increases decreases D increases increases
Mark scheme: B
Q39 · An atom of beryllium is represented by Be
39 An atom of beryllium is represented by Be. 9 4 How many neutrons are in the nucleus of this type of beryllium atom? A 4 B 5 C 9 D 13
Mark scheme: B
Q40 · A beam of -rays passes into an electric field between two charged plates
40 A beam of -rays passes into an electric field between two charged plates. Which diagram shows what happens to the -rays? A B C D – + – + – + – + – + – + – + – + – + – + – + – + – + – + – + – + – + – + – + – + – + – + – + – +
Mark scheme: D
What was in this paper
The subtopics covered by these 40 questions, and how many questions each got. Open one in a new tab to see every Cambridge question on it.
2Air quality and climate1Alkenes1Biological molecules1Cell structure1Characteristics of living organisms1Coordination and response1Digestive system1Drugs1Electrical circuits1Electrolysis1Electromagnetic effects1Electromagnetic spectrum1Enzymes1Exothermic and endothermic reactions1Experimental design1Food chains and food webs1Forces1Formulas1Habitat destruction1Heart1Identification of ions and gases1Light1Noble gases1Photosynthesis1Physical and chemical changes1Polymers1Pressure1Properties of metals1Radioactivity1Reactivity series1Redox1Selection1Sexual reproduction1Simple phenomena of magnetism1The characteristic properties of acids and bases1The nucleus1Thermal properties and temperature1Transfer of thermal energy1What you needed in this session
Cambridge’s own grade thresholds for 2022 May/June, Paper 2 · Variant 2. A higher threshold means an easier paper — the bar moves with how the cohort did.