Cambridge IGCSE Sciences - Co-ordinated (Double) 0654 — 2019 Oct/Nov Paper 1 · Variant 2
0654/12/O/N/19 · 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 term is used to describe the removal of toxic materials from living organisms?
1 Which term is used to describe the removal of toxic materials from living organisms? A excretion B nutrition C respiration D secretion
Mark scheme: A
Q2 · Which row describes diffusion?
2 Which row describes diffusion? direction of type of net movement movement A higher concentration non-random to lower concentration B higher concentration random to lower concentration C lower concentration non-random to higher concentration D lower concentration random to higher concentration
Mark scheme: B
Q3 · Which result with the biuret test shows that protein is present?
3 Which result with the biuret test shows that protein is present? A blue B green C orange D purple
Mark scheme: D
Q4 · A solution of salivary amylase is boiled in a test tube
4 A solution of salivary amylase is boiled in a test tube. The boiled amylase is then added to a solution of starch. Which graph shows what happens to the concentration of starch in the mixture during the next 10 minutes? A B concentration concentration of starch of starch 0 2 4 6 8 10 0 2 4 6 8 10 time / minutes time / minutes C D concentration concentration of starch of starch 0 2 4 6 8 10 0 2 4 6 8 10 time / minutes time / minutes
Mark scheme: B
Q5 · What is the word equation for photosynthesis?
5 What is the word equation for photosynthesis? A carbon dioxide + glucose → oxygen + water B carbon dioxide + water → oxygen + glucose C oxygen + glucose → carbon dioxide + water D oxygen + water → carbon dioxide + glucose
Mark scheme: B
Q6 · The diagram shows some parts of the alimentary canal and its associated organs
6 The diagram shows some parts of the alimentary canal and its associated organs. P Q R S Which organs produce digestive enzymes? A P and Q B Q and R C R and S D S and P
Mark scheme: B
Q7 · The diagrams show sections through a stem and a root
7 The diagrams show sections through a stem and a root. S Q P T stem root Which indicate the positions of the xylem? A P and S B P and T C Q and S D Q and T
Mark scheme: B
Q8 · Which area represents the substances produced in aerobic respiration?
8 Which area represents the substances produced in aerobic respiration? carbon A oxygen dioxide B C D water
Mark scheme: C
Q9 · A growing seedling was held in position as shown in the diagram
9 A growing seedling was held in position as shown in the diagram. root shoot bean seed It was then placed in the dark for 3 days. Which diagram shows the shape of the root and the shoot of the same seedling after the 3 days? A B C D
Mark scheme: D
Q10 · Sexual reproduction involves the fusion of cells
10 Sexual reproduction involves the fusion of cells. Which row shows the types of cells involved and what the fusion produces? type of cell product of fusion A gametes genetically different zygote B gametes genetically identical zygote C zygotes genetically different gamete D zygotes genetically identical gamete
Mark scheme: A
Q11 · Which statement about human gametes is correct?
11 Which statement about human gametes is correct? A Only 50% of egg cells contain an X chromosome. B Only 50% of sperm cells contain a Y chromosome. C 100% of egg cells contain a Y chromosome. D 100% of sperm cells contain an X chromosome.
Mark scheme: B
Q12 · Which statement about how organisms get their energy is not correct?
12 Which statement about how organisms get their energy is not correct? organism source of energy A carnivores animals B decomposers dead plants C green plants minerals D herbivores plants
Mark scheme: C
Q13 · What changes in combustion and deforestation increase carbon dioxide in the atmosphere?
13 What changes in combustion and deforestation increase carbon dioxide in the atmosphere? A decreased combustion, decreased deforestation B decreased combustion, increased deforestation C increased combustion, decreased deforestation D increased combustion, increased deforestation
Mark scheme: D
Q14 · How is copper sulfate separated from aqueous copper sulfate?
14 How is copper sulfate separated from aqueous copper sulfate? A chromatography B crystallisation C filtration D fractional distillation
Mark scheme: B
Q15 · Which processes are chemical changes?
15 Which processes are chemical changes? 1 conversion of steam to liquid water 2 cracking of alkanes 3 fractional distillation of petroleum 4 thermal decomposition of calcium carbonate A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4
Mark scheme: D
Q16 · In which molecule are all the outer electrons of the atoms used in covalent bonds?
16 In which molecule are all the outer electrons of the atoms used in covalent bonds? A CH4 B HCl C H2O D NH3
Mark scheme: A
Q17 · Hydrogen peroxide is a compound
17 Hydrogen peroxide is a compound. A molecule of hydrogen peroxide can be represented as shown. key = oxygen = hydrogen What is the formula of hydrogen peroxide? A HO B H2O2 C (OH)2 D 2OH
Mark scheme: B
Q18 · The table shows the temperature of some water before and after a solid is dissolved in it
18 The table shows the temperature of some water before and after a solid is dissolved in it. Which change is the most exothermic? temperature before temperature after / °C / °C A 20 18 B 20 40 C 25 18 D 25 42
Mark scheme: B
Q19 · Which statement explains why the rusting of iron is an oxidation reaction?
19 Which statement explains why the rusting of iron is an oxidation reaction? A Iron gains oxygen. B Iron is a transition metal. C Iron is very reactive. D Iron loses oxygen.
Mark scheme: A
Q20 · An acid neutralises solution X
20 An acid neutralises solution X. A neutral solution is formed. What are the pH values of solution X and of the neutral solution? pH of solution X pH of neutral solution A 2 7 B 2 12 C 12 2 D 12 7
Mark scheme: D
More questions on The characteristic properties of acids and bases
Q21 · The colours in an ink can be separated by chromatography
21 The colours in an ink can be separated by chromatography. Which diagram shows the correct way to set up the apparatus? A B spot of ink spot of ink solvent solvent C D spot of ink spot of ink solvent solvent
Mark scheme: C
Q22 · Which statement about the Periodic Table is correct?
22 Which statement about the Periodic Table is correct? A Elements are listed in order of neutron number. B Elements are listed in order of nucleon number. C Elements are listed in order of proton number. D Elements are listed in order of relative atomic mass.
Mark scheme: C
Q23 · Zinc is mixed with molten element X
23 Zinc is mixed with molten element X. A new material, Y, is made. Y conducts electricity. Which type of substance is Y? A alloy B covalent compound C macromolecule D ionic compound
Mark scheme: A
Q24 · Which pie chart represents the composition of clean air?
24 Which pie chart represents the composition of clean air? A B N2 O2 other H2 gases O2 N2 C D O2 H2 other O2 gases N2 N2
Mark scheme: C
Q25 · Which substances neutralise acids?
25 Which substances neutralise acids? 1 lime 2 limestone 3 calcium hydroxide A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3
Mark scheme: D
More questions on The characteristic properties of acids and bases
Q26 · Which diagram represents a molecule of ethane?
26 Which diagram represents a molecule of ethane? A B C D H H H H H H H H C H C C H C C H H C C O H H H H H H H H
Mark scheme: C
Q27 · The flow diagram shows the manufacture of ethanol from alkanes
27 The flow diagram shows the manufacture of ethanol from alkanes. process X reagent Y alkane ethene ethanol What are process X and reagent Y? process X reagent Y A cracking hydrogen B cracking steam C fractional distillation hydrogen D fractional distillation steam
Mark scheme: B
Q28 · Four solid cuboid blocks P, Q, R and S have the dimensions shown in the diagram and…
28 Four solid cuboid blocks P, Q, R and S have the dimensions shown in the diagram and masses that are equal. P Q R S 6.0 cm 3.0 cm 2.0 cm 2.0 cm 2.0 cm 2.0 cm 3.0 cm 2.0 cm 4.0 cm 2.0 cm 4.0 cm 1.0 cm Which two blocks have the same density? A P and Q B Q and R C Q and S D R and S
Mark scheme: C
Q29 · What cannot be changed by a force acting on a body?
29 What cannot be changed by a force acting on a body? A the mass of the body B the motion of the body C the shape of the body D the size of the body
Mark scheme: A
Q30 · Four cars travel up the same hill
30 Four cars travel up the same hill. They have different masses and take different times to travel up the hill. Which car is supplying the most useful power? mass of time taken to car / kg travel up hill / s A 1500 10 B 1500 20 C 3000 10 D 3000 20
Mark scheme: C
Q31 · A ball is dropped from rest and falls
31 A ball is dropped from rest and falls. Which row describes the kinetic energy and the gravitational potential energy of the ball immediately after it is released? gravitational kinetic energy potential energy A decreasing decreasing B decreasing increasing C increasing decreasing D increasing increasing
Mark scheme: C
Q32 · A substance is a gas when its temperature is 65 °C
32 A substance is a gas when its temperature is 65 °C. How do the boiling point and the melting point of this substance compare with 65 °C? boiling point melting point A above 65 °C above 65 °C B above 65 °C below 65 °C C below 65 °C above 65 °C D below 65 °C below 65 °C
Mark scheme: D
Q33 · A room is heated using an electric heater placed on the floor
33 A room is heated using an electric heater placed on the floor. What is the name of the process by which the heated air moves around the room? A conduction B convection C evaporation D radiation
Mark scheme: B
Q34 · A student looks at her image in a vertical plane mirror
34 A student looks at her image in a vertical plane mirror. Which row describes the size of the image and its position? size position A magnified behind mirror B magnified on surface of mirror C same as student behind mirror D same as student on surface of mirror
Mark scheme: C
Q35 · Which row gives the properties of a sound wave that affect the pitch and the loudness of…
35 Which row gives the properties of a sound wave that affect the pitch and the loudness of a sound? pitch loudness A amplitude amplitude B amplitude frequency C frequency amplitude D frequency frequency
Mark scheme: C
Q36 · There is a current of 4.0 A in a resistor and a potential difference (p.d.) of 12 V…
36 There is a current of 4.0 A in a resistor and a potential difference (p.d.) of 12 V across it. What is the resistance of the resistor? A 0.33 Ω B 3.0 Ω C 8.0 Ω D 48 Ω
Mark scheme: B
Q37 · A 1.0 Ω resistor, a 3.0 Ω resistor, and a 6.0 Ω resistor are connected in series
37 A 1.0 Ω resistor, a 3.0 Ω resistor, and a 6.0 Ω resistor are connected in series. What is the combined resistance of this combination? A 4.0 Ω B 7.0 Ω C 10 Ω D 18 Ω
Mark scheme: C
Q38 · Which row shows how lamps are connected in a lighting circuit in a house and gives an…
38 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
Q39 · An electrical extension block has four sockets, a cable which can safely take a current…
39 An electrical extension block has four sockets, a cable which can safely take a current of 6 A and a plug. It is protected by a fuse rated at 5 A. The extension block is used with four appliances and the 5 A fuse blows. The owner replaces the 5 A fuse with a 13 A fuse. Why is the extension block now dangerous? A The appliances may overheat before the fuse blows. B The cable may overheat before the fuse blows. C The sockets may burn out before the fuse blows. D The 13 A fuse may blow too soon.
Mark scheme: B
Q40 · Which type of radiation has the greatest ionising effect, and which is the most…
40 Which type of radiation has the greatest ionising effect, and which is the most penetrating? greatest ionising most penetrating effect A α-particles α-particles B α-particles γ-rays C γ-rays α-particles D γ-rays γ-rays
Mark scheme: B
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.
2Energy, work and power2The characteristic properties of acids and bases2Air quality and climate1Alkanes1Alkenes1Alloys and their properties1Arrangement of elements1Biological molecules1Carbon cycle1Characteristics of living organisms1Chromatography1Coordination and response1Density1Diffusion1Digestive system1Electrical quantities1Electrical safety1Energy flow1Enzymes1Exothermic and endothermic reactions1Forces1Formulas1Kinetic particle model of matter1Light1Photosynthesis1Physical and chemical changes1Radioactivity1Redox1Respiration1Separation and purification1Sexual reproduction1Sexual reproduction in humans1Simple molecules and covalent bonds1Sound1Transfer of thermal energy1Xylem and phloem1What you needed in this session
Cambridge’s own grade thresholds for 2019 Oct/Nov, Paper 1 · Variant 2. A higher threshold means an easier paper — the bar moves with how the cohort did.