Cambridge IGCSE Science - Combined 0653 — 2022 May/June Paper 2 · Variant 3

Question 1

1 What is the outermost layer of an animal cell and a plant cell? animal cell plant cell A cell membrane cell membrane B cell membrane cell wall C cell wall cell membrane D cell wall cell wall

Accepted Answer

B

Question 2

2 What is the definition of diffusion? A the downward movement of particles in the atmosphere B the movement of particles down a concentration gradient C the movement of molecules against a concentration gradient D the movement of particles from a hotter to a cooler region

Accepted Answer

B

Question 3

3 The enzyme salivary amylase starts digesting starchy foods in the mouth. This stops when the food reaches the stomach. Why does this happen? A The acid in the stomach slows down all reactions. B The shape of the active site of the enzyme is altered by the low pH. C The kinetic energy of molecules is reduced by acids. D The shape of the substrate molecules is changed.

Accepted Answer

B

Question 4

4 Stomata are found in the leaves of plants. What is their main function? A gas exchange B structural support C transport of food molecules D transport of water

Accepted Answer

A

Question 5

5 The graph shows the daily energy requirements for two people, P and Q. daily energy requirements P Q Which statements could describe P and Q? 1 P is a mother who is breast-feeding her baby and Q is a mother who is bottle-feeding her baby. 2 P is a 20-year-old adult male and Q is a 20-year-old adult female. 3 P is an office worker and Q is a professional cyclist. A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

Accepted Answer

A

Question 6

6 The diagram shows the digestion of fat. ......1...... glycerol ......2...... and ......3...... large piece small pieces of fat of fat Which row completes gaps 1, 2 and 3 in the diagram? 1 2 3 A chemical digestion chemical digestion amino acids B chemical digestion mechanical digestion fatty acids C mechanical digestion mechanical digestion amino acids D mechanical digestion chemical digestion fatty acids

Accepted Answer

D

Question 7

7 Which statement about root hair cells is correct? A They are present in large numbers to increase the absorption of water. B They are only present in young seedlings before major roots grow. C They are branched to help prevent the wind dislodging a plant. D They have a large surface area to allow carbon dioxide uptake.

Accepted Answer

A

Question 8

8 Physical activity affects our rate and depth of breathing. What happens during increased physical activity? rate of breathing depth of breathing A decreases decreases B decreases increases C increases decreases D increases increases

Accepted Answer

D

Question 9

9 Some statements about adrenaline are listed. 1 It has one target organ. 2 It is a hormone. 3 It is produced by a gland. 4 It is transported in the blood. Which statements are correct? A 1, 2 and 3 only B 1, 2 and 4 only C 2, 3 and 4 only D 1, 2, 3 and 4

Accepted Answer

C

Question 10

10 The diagram shows a seed germinating in soil. soil surface shoot root Which tropic responses are taking place in the shoot and root while they are still underground? shoot root A gravitropism gravitropism B gravitropism phototropism C phototropism gravitropism D phototropism phototropism

Accepted Answer

A

Question 11

11 The diagram shows a typical wind-pollinated flower. Which structure is the stigma? A B C D

Accepted Answer

A

Question 12

12 During sexual intercourse the penis transfers sperm cells to the vagina. What is the pathway for sperm cells from their site of production to the vagina? A sperm ducts  testes  urethra  vagina B testes  sperm ducts  urethra  vagina C testes  urethra  sperm ducts  vagina D urethra  testes  sperm ducts  vagina

Accepted Answer

B

Question 13

13 The diagram shows a food chain from an ocean ecosystem. microscopic plants  krill  small fish  tuna  shark What is the trophic level of the tuna? A primary consumer B quaternary consumer C secondary consumer D tertiary consumer

Accepted Answer

D

Question 14

14 When solid sodium carbonate is added to dilute hydrochloric acid, it dissolves and carbon dioxide is given off. Which statement is correct? A This is a chemical change because sodium carbonate dissolves. B This is a chemical change because the acid reacts with sodium carbonate. C This is a physical change because sodium carbonate dissolves. D This is a physical change because the acid reacts with sodium carbonate.

Accepted Answer

B

Question 15

15 Which statement about non-metallic elements is correct? A They are hard. B They are malleable. C They conduct electricity. D They have low densities.

Accepted Answer

D

Question 16

16 Which statement about the movement of particles during the electrolysis of dilute sulfuric acid is correct? A Anions move to the negative electrode and lose electrons. B Electrons travel through the electrolyte from the cathode to the anode. C Electrons travel through the external circuit from the anode to the cathode. D Positive ions move to the anode and gain electrons.

Accepted Answer

C

Question 17

17 Which row describes what happens to the frequency of collisions between reacting particles and the energy of these collisions when the concentration of the reactants is decreased? frequency of energy of collisions collisions A decreases decreases B decreases no change C increases decreases D increases no change

Accepted Answer

B

Question 18

18 The equation for a reaction that occurs in the blast furnace is shown. Fe2O3  +  3CO    2Fe  +  3CO2 Which statement about the reaction is correct? A Fe2O3 is the oxidising agent. B CO2 is the reducing agent. C CO is reduced. D Fe2O3 is oxidised.

Accepted Answer

A

Question 19

19 Three powders are added to dilute sulfuric acid, as shown.

magnesium
powder

dilute
sulfuric acid

Which powders react to produce water?

magnesium

oxide
powder

dilute
sulfuric acid

magnesium

magnesium
oxide

x \ x

magnesium
carbonate

\ \ x

magnesium
carbonate
powder

dilute
sulfuric acid

key
¥ = does produce water

X = does not produce water

Accepted Answer

C

Question 20

20 Salt X is produced in the reaction between solid Y and acid Z. The following method is used to prepare crystals of salt X. ● Solid Y is added to acid Z until no further reaction occurs. ● Any unreacted solid Y is removed by filtration. ● The filtrate is evaporated to the point of crystallisation and left to cool. ● Salt X crystallises. Which row shows the substances that can be used to produce a salt by using this method? solid Y acid Z salt X A insoluble copper dilute hydrochloric acid soluble copper(II) chloride B insoluble lead carbonate dilute sulfuric acid insoluble lead sulfate C soluble sodium hydroxide dilute hydrochloric acid soluble sodium chloride D insoluble zinc oxide dilute sulfuric acid soluble zinc sulfate

Accepted Answer

D

Question 21

21 The results of two tests on substance Q are shown. test result add dilute hydrochloric acid bubbles of colourless gas, R, to solid Q which turns limewater milky add aqueous sodium hydroxide green precipitate to a solution of Q Which cation is present in Q and what is gas R? cation present in Q gas R A iron(II) carbon dioxide B iron(II) chlorine C iron(III) carbon dioxide D iron(III) chlorine

Accepted Answer

A

Question 22

22 In which mixture is the aqueous metal ion displaced by the metal? A Cu2+ and Zn B Fe2+ and Cu C Mg2+ and Zn D Zn2+ and Fe

Accepted Answer

A

Question 23

23 Iron is extracted from iron(III) oxide in the blast furnace. Which reaction produces the heat to maintain a high temperature in the furnace? A calcium carbonate    calcium oxide  +  carbon dioxide B carbon  +  oxygen    carbon dioxide C iron(III) oxide  +  carbon monoxide    iron  +  carbon dioxide D silicon dioxide  +  calcium oxide    calcium silicate

Accepted Answer

B

Question 24

24 Which statement about the treatment of the water supply is correct? A After filtration and chlorination, the water contains no impurities. B Chlorine is added to remove dissolved impurities. C Water is filtered and chlorinated to remove solids and kill bacteria. D Water is filtered to remove dissolved impurities.

Accepted Answer

C

Question 25

25 Which statement best describes the members of a homologous series? A They have different general formulae and different chemical properties. B They have different general formulae and similar chemical properties. C They have the same general formula and different chemical properties. D They have the same general formula and similar chemical properties.

Accepted Answer

D

Question 26

26 Methane, ethane and propane are all alkanes. Their formulae are shown. methane, CH4 ethane, C2H6 propane, C3H8 Which statement is not correct? A All three compounds are hydrocarbons. B All three compounds burn. C Methane is the main constituent of natural gas. D Propane burns completely to form carbon dioxide and hydrogen.

Accepted Answer

D

Question 27

27 Which substance rapidly turns aqueous bromine from orange to colourless? A ethane B ethanol C ethene D methane

Accepted Answer

C

Question 28

28 A climber climbs a mountain. The gravitational field strength at the top of the mountain is less than it is at the bottom. How do the mass and the weight of the climber at the top compare with the mass and the weight at the bottom? mass at top compared weight at top compared with mass at bottom with weight at bottom A less less B less the same C the same less D the same the same

Accepted Answer

C

Question 29

29 A stone is placed on a balance. The reading on the balance is shown. stone 52.8 g balance The stone is lowered carefully into a measuring cylinder that contains 50 cm3 of water. The level of the water in the measuring cylinder rises to the 72 cm3 mark. What is the density of the stone? A 0.42 g / cm3 B 0.73 g / cm3 C 1.36 g / cm3 D 2.40 g / cm3

Accepted Answer

D

Question 30

30 A man lifts four heavy boxes from the ground onto a high shelf, one at a time. When does he develop the greatest power? A lifting a box of mass 20 kg in 3.0 s B lifting a box of mass 20 kg in 4.0 s C lifting a box of mass 30 kg in 3.0 s D lifting a box of mass 30 kg in 4.0 s

Accepted Answer

C

Question 31

31 The volume of a gas decreases and the temperature of the gas increases. Which row describes the changes to the separation and to the speed of the gas molecules? separation speed A decreases decreases B decreases increases C increases decreases D increases increases

Accepted Answer

B

Question 32

32 A mechanic cannot remove a large steel nut from a steel bolt because it is too tight. bolt nut What does the mechanic do to help remove the nut? A cool the nut and heat the bolt B heat the bolt only C heat the nut and the bolt through the same temperature rise D heat the nut only

Accepted Answer

D

Question 33

33 What is the main method of thermal energy transfer in liquids? A conduction B convection C absorption D radiation

Accepted Answer

B

Question 34

34 Light travels at a speed of 3.0  108 m / s in a vacuum. A radio station transmits radio waves at a frequency of 9.1  107 Hz. What is the wavelength of the radio waves? A 0.30 m B 0.33 m C 3.0 m D 3.3 m

Accepted Answer

D

Question 35

35 A student uses a converging lens as a magnifying glass to view an insect. Which labelled point is a possible position for the image of the head of the insect? A converging lens head B C D insect student’s eye

Accepted Answer

A

Question 36

36 Where does sound travel at the greatest speed? A in a gas B in a liquid C in a solid D in a vacuum

Accepted Answer

C

Question 37

37 Two balloons X and Y are suspended by insulating threads. They are each held near a negatively charged balloon. The balloons hang as shown. insulating insulating threads threads – – – – – – – – – – – – – X – – Y ––– – – – – – – What is the charge on balloon X and what is the charge on balloon Y? balloon X balloon Y A negative negative B negative positive C positive negative D positive positive

Accepted Answer

B

Question 38

38 A circuit contains two lamps and a variable resistor. lamp 1 lamp 2 The resistance of the variable resistor is increased. What happens to the brightness of lamp 1 and what happens to the brightness of lamp 2? brightness of lamp 1 brightness of lamp 2 A decreases decreases B decreases increases C no change decreases D no change increases

Accepted Answer

A

Question 39

39 A torch (flashlight) contains a 3.0 V battery. When the torch is switched on the current in the battery is 0.50 A. How much energy is transferred by the battery in 1.0 minute? A 1.5 J B 6.0 J C 90 J D 360 J

Accepted Answer

C

Question 40

40 What is the purpose of a fuse in an electric circuit? A to disconnect the circuit if the current becomes too large B to increase the voltage if the current becomes too small C to prevent someone cutting the insulation of the wiring D to stop water getting into the circuit

Accepted Answer

A

Question paper16 pages

Mark scheme3 pages

Questions as text

Q1 · What is the outermost layer of an animal cell and a plant cell?

Q2 · What is the definition of diffusion?

Q3 · The enzyme salivary amylase starts digesting starchy foods in the mouth

Q4 · Stomata are found in the leaves of plants

Q5 · The graph shows the daily energy requirements for two people, P and Q

Q6 · The diagram shows the digestion of fat

Q7 · Which statement about root hair cells is correct?

Q8 · Physical activity affects our rate and depth of breathing

Q9 · Some statements about adrenaline are listed

Q10 · The diagram shows a seed germinating in soil

Q11 · The diagram shows a typical wind-pollinated flower

Q12 · During sexual intercourse the penis transfers sperm cells to the vagina

Q13 · The diagram shows a food chain from an ocean ecosystem

Q14 · When solid sodium carbonate is added to dilute hydrochloric acid, it dissolves and carbon…

Q15 · Which statement about non-metallic elements is correct?

Q16 · Which statement about the movement of particles during the electrolysis of dilute…

Q17 · Which row describes what happens to the frequency of collisions between reacting…

Q18 · The equation for a reaction that occurs in the blast furnace is shown

Q19 · Three powders are added to dilute sulfuric acid, as shown

Q20 · Salt X is produced in the reaction between solid Y and acid Z

Q21 · The results of two tests on substance Q are shown

Q22 · In which mixture is the aqueous metal ion displaced by the metal?

Q23 · Iron is extracted from iron(III) oxide in the blast furnace

Q24 · Which statement about the treatment of the water supply is correct?

Q25 · Which statement best describes the members of a homologous series?

Q26 · Methane, ethane and propane are all alkanes

Q27 · Which substance rapidly turns aqueous bromine from orange to colourless?

Q28 · A climber climbs a mountain

Q29 · A stone is placed on a balance

Q30 · A man lifts four heavy boxes from the ground onto a high shelf, one at a time

Q31 · The volume of a gas decreases and the temperature of the gas increases

Q32 · A mechanic cannot remove a large steel nut from a steel bolt because it is too tight

Q33 · What is the main method of thermal energy transfer in liquids?

Q34 · Light travels at a speed of 3.0  108 m / s in a vacuum

Q35 · A student uses a converging lens as a magnifying glass to view an insect

Q36 · Where does sound travel at the greatest speed?

Q37 · Two balloons X and Y are suspended by insulating threads

Q38 · A circuit contains two lamps and a variable resistor

Q39 · A torch (flashlight) contains a 3.0 V battery

Q40 · What is the purpose of a fuse in an electric circuit?

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