Cambridge IGCSE Science - Combined 0653 — 2019 May/June Paper 1 · Variant 1

Question 1

1 Which characteristics are found in all living organisms? excretion growth photosynthesis respiration A yes yes no yes B yes yes yes no C yes no yes yes D no yes yes yes

Accepted Answer

A

Question 2

2 Uncooked pieces of potato of identical size were placed in different liquids for one hour. 1 pure water 2 sugar solution less concentrated than the cell contents 3 sugar solution more concentrated than the cell contents 4 sugar solution of the same concentration as the cell contents After this time, which liquids will cause an increase in the size of the pieces of potato? A 1, 2 and 4 B 1, 3 and 4 C 1 and 2 only D 1 only

Accepted Answer

C

Question 3

3 Which row identifies the graphs that show the effect of temperature and the effect of pH on an enzyme-controlled reaction? 1 2 3 rate of rate of rate of reaction reaction reaction temperature pH A graph 1 graph 2 B graph 2 graph 3 C graph 1 graph 3 D graph 3 graph 2

Accepted Answer

C

Question 4

4 What helps maintain healthy gums? A calcium B iron C vitamin C D vitamin D

Accepted Answer

C

Question 5

5 What is a function of the small intestine? A It cuts food into small pieces. B It provides a large surface area for absorption. C It provides space for the storage of faeces. D It stores food.

Accepted Answer

B

Question 6

6 The graphs P, Q and R show the changes in the volume of air in the lungs of the same person, measured after different levels of activities. P Q 2 2 volume volume of air in 1 of air in 1 lungs / dm3 lungs / dm3 0 0 0 10 20 0 10 20 time / s time / s R 2 volume of air in 1 lungs / dm3 0 0 10 20 time / s Which row shows the correct graph for each level of activity? immediately immediately at rest after 10 minutes after 10 minutes of running of walking A P Q R B P R Q C R Q P D R P Q

Accepted Answer

B

Question 7

7 Which word equation represents aerobic respiration? A carbon dioxide  +  glucose  →  oxygen  +  water B glucose  +  oxygen  →  carbon dioxide  +  water C oxygen  +  water  →  carbon dioxide  +  glucose D water  +  carbon dioxide  →  glucose  +  oxygen

Accepted Answer

B

Question 8

8 How does adrenaline affect blood glucose concentration and pulse rate? blood glucose pulse rate concentration A decreases decreases B decreases increases C increases decreases D increases increases

Accepted Answer

D

Question 9

9 Diagram 1 shows a growing seedling after the first few days’ growth. The seedling was then rotated, held in the position shown in diagram 2 and placed in the dark for three days. diagram 1 diagram 2 What is the shape of the seedling three days later? A B C D

Accepted Answer

B

Question 10

10 What are the features of sexual reproduction? fusion nature of offspring of nuclei A no genetically dissimilar B yes genetically identical C no genetically identical D yes genetically dissimilar

Accepted Answer

D

Question 11

11 The diagram shows a section through an insect-pollinated flower. 1 2 3 4 Which labels are correct? anther petal sepal stigma A 1 3 4 2 B 1 4 3 2 C 2 3 4 1 D 2 4 3 1

Accepted Answer

A

Question 12

12 The diagram shows a food web. small fish mosquito larvae water fleas protozoa rotifers green algae Which organisms are both primary and secondary consumers? A small fish only B protozoa and rotifers C protozoa only D rotifers only

Accepted Answer

D

Question 13

13 Which gas builds up in the atmosphere as a result of deforestation? A carbon dioxide B methane C nitrogen D oxygen

Accepted Answer

A

Question 14

14 The diagram shows apparatus used for filtration. Why can sugar and salt not be separated by using this apparatus? A They are both compounds. B They are both white. C They both dissolve in water. D They both have the same size particles.

Accepted Answer

C

Question 15

15 Copper sulfate crystals dissolve in water. Which word describes the role of the water? A filtrate B solute C solution D solvent

Accepted Answer

D

Question 16

16 Which row describes an ionic compound? melting electrical conductivity electrical conductivity point / °C when solid when dissolved in water A –7 poor good B 119 poor insoluble C 801 poor good D 3652 good insoluble

Accepted Answer

C

Question 17

17 Aluminium sulfate contains two aluminium atoms, three sulfur atoms and twelve oxygen atoms. What is the formula of aluminium sulfate? A 2Al 3S6O B 2Al S3O12 C Al 2(SO4)3 D Al 23(SO4)

Accepted Answer

C

Question 18

18 Molten lead(II) bromide is electrolysed using inert electrodes. power supply + – inert inert anode cathode molten lead(II) bromide What is formed at each electrode? anode cathode A grey solid orange-brown gas B grey solid grey solid C orange-brown gas orange-brown gas D orange-brown gas grey solid

Accepted Answer

D

Question 19

19 When an excess of zinc is added to dilute hydrochloric acid, a gas is released. Which pieces of apparatus are needed to investigate the rate of this reaction? 1 balance 2 gas syringe 3 stop watch 4 thermometer A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

Accepted Answer

C

Question 20

20 Methane reacts with copper oxide. The equation for the reaction is shown. 4CuO  +  CH4  →  4Cu  +  CO2  +  2H2O Which statement about this reaction is correct? A Carbon is reduced. B Copper oxide is oxidised. C It is a redox reaction. D Methane is reduced.

Accepted Answer

C

Question 21

21 Which aqueous ion gives a white precipitate with aqueous sodium hydroxide and with aqueous ammonia? A Cu2+ B Fe2+ C Fe3+ D Zn2+

Accepted Answer

D

Question 22

22 Which row describes the physical state of the Group VII elements at room temperature? chlorine bromine iodine A gas gas liquid B gas liquid solid C liquid liquid gas D liquid solid solid

Accepted Answer

B

Question 23

23 Which gas is used to fill lamps? A argon B carbon dioxide C hydrogen D oxygen

Accepted Answer

A

Question 24

24 Which two elements do not form an alloy? A carbon and sulfur B carbon and iron C copper and zinc D silver and gold

Accepted Answer

A

Question 25

25 Two open containers, X and Y, are inside a glass tube. Steam passes over solids in X and Y, as shown. glass tube steam X Y X contains anhydrous copper(II) sulfate. Y contains hydrated cobalt(II) chloride. What is observed? A The solid in X remains blue. B The solid in X turns from white to blue. C The solid in Y turns from blue to pink. D The solid in Y turns from pink to white.

Accepted Answer

B

Question 26

26 Which statement shows that petroleum is a mixture? A Petroleum can be burned as a fuel. B Petroleum can be separated into fractions by distillation. C Petroleum is a fossil fuel formed over millions of years. D Petroleum is a thick, black liquid.

Accepted Answer

B

Question 27

27 Which statement about alkanes is not correct? A Alkanes are unsaturated hydrocarbons. B Alkanes burn to release heat energy. C Alkanes form carbon dioxide and water when they burn. D Alkane molecules contain only single bonds.

Accepted Answer

A

Question 28

28 Which labelled part of the electromagnetic spectrum is often involved in thermal energy transfer by radiation? radio gamma A B C D waves rays visible light

Accepted Answer

B

Question 29

29 What does the gradient of a speed–time graph represent? A acceleration B average speed C distance travelled D time taken

Accepted Answer

A

Question 30

30 The diagram shows a tug-of-war between team X and team Y. The arrows show the forces exerted by the teams on the rope. team X team Y rope 325 N 400 N What is the size of the resultant force on the rope and in which direction does the resultant force act? size of direction of resultant force / N resultant force A 75 to the left B 75 to the right C 725 to the left D 725 to the right

Accepted Answer

B

Question 31

31 A ball made of soft clay is dropped and hits the ground. It does not bounce. soft clay ball ground What energy changes take place as the ball drops and hits the ground? A gravitational potential → kinetic → thermal B gravitational potential → thermal → kinetic C kinetic → gravitational potential → thermal D kinetic → thermal → gravitational potential

Accepted Answer

A

Question 32

32 Which two quantities are used to calculate the power produced by a car engine? A the speed of the car and the distance the car has travelled B the speed of the car and the time for the journey C the work done by the engine and the distance the car has travelled D the work done by the engine and the time taken to do the work

Accepted Answer

D

Question 33

33 Benzene and glycerine are two substances. The table gives the melting point and the boiling point of benzene and of glycerine. melting point / °C boiling point / °C benzene 5.4 80 glycerine 18 290 At which temperature are both benzene and glycerine liquid? A 0 °C B 50 °C C 90 °C D 300 °C

Accepted Answer

B

Question 34

34 The diagram shows a vacuum flask containing a hot liquid in a cold room. X and Y are points on the inside surfaces of the walls of the flask. cold room X Y hot liquid vacuum How is thermal energy transferred through the vacuum between X and Y? A by conduction and convection B by conduction only C by radiation and convection D by radiation only

Accepted Answer

D

Question 35

35 The diagram represents a wave at one moment. Q R S P Which labelled arrows represent the amplitude and the wavelength of the wave? amplitude wavelength A P R B P S C Q R D Q S

Accepted Answer

D

Question 36

36 Which row describes the characteristics of the image of an object formed by a plane mirror? type of image size of image A real same as object B real smaller than object C virtual same as object D virtual smaller than object

Accepted Answer

C

Question 37

37 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 pitch becomes lower. C It becomes quieter and its pitch becomes higher. D It becomes quieter and its pitch becomes lower.

Accepted Answer

C

Question 38

38 The diagram shows a circuit set up by a student. A V How is the resistance of the resistor calculated? ammeter reading A voltmeter reading B ammeter reading × voltmeter reading voltmeter reading C ammeter reading D voltmeter reading + ammeter reading

Accepted Answer

C

Question 39

39 A circuit contains four ammeters P, Q, R and S. A Q P A A R A S Which of these ammeters show the greatest reading? A P only B P and Q C R only D R and S

Accepted Answer

B

Question 40

40 A mains circuit can safely supply a current of up to 40 A. The current in a hairdryer is 2 A when it is operating normally. The hairdryer is connected to the mains by a lead which can safely carry up to 5 A. What is the correct fuse to protect the hairdryer? A 1 A fuse B 3 A fuse C 10 A fuse D 50 A fuse

Accepted Answer

B

Question paper16 pages

Mark scheme3 pages

Questions as text

Q1 · Which characteristics are found in all living organisms?

Q2 · Uncooked pieces of potato of identical size were placed in different liquids for one hour

Q3 · Which row identifies the graphs that show the effect of temperature and the effect of pH…

Q4 · What helps maintain healthy gums?

Q5 · What is a function of the small intestine?

Q6 · The graphs P, Q and R show the changes in the volume of air in the lungs of the same…

Q7 · Which word equation represents aerobic respiration?

Q8 · How does adrenaline affect blood glucose concentration and pulse rate?

Q9 · A growing seedling after the first few days’ growth

Q10 · What are the features of sexual reproduction?

Q11 · The diagram shows a section through an insect-pollinated flower

Q12 · The diagram shows a food web

Q13 · Which gas builds up in the atmosphere as a result of deforestation?

Q14 · The diagram shows apparatus used for filtration

Q15 · Copper sulfate crystals dissolve in water

Q16 · Which row describes an ionic compound?

Q17 · Aluminium sulfate contains two aluminium atoms, three sulfur atoms and twelve oxygen atoms

Q18 · Molten lead(II) bromide is electrolysed using inert electrodes

Q19 · When an excess of zinc is added to dilute hydrochloric acid, a gas is released

Q20 · Methane reacts with copper oxide

Q21 · Which aqueous ion gives a white precipitate with aqueous sodium hydroxide and with…

Q22 · Which row describes the physical state of the Group VII elements at room temperature?

Q23 · Which gas is used to fill lamps?

Q24 · Which two elements do not form an alloy?

Q25 · Two open containers, X and Y, are inside a glass tube

Q26 · Which statement shows that petroleum is a mixture?

Q27 · Which statement about alkanes is not correct?

Q28 · Which labelled part of the electromagnetic spectrum is often involved in thermal energy…

Q29 · What does the gradient of a speed–time graph represent?

Q30 · The diagram shows a tug-of-war between team X and team Y

Q31 · A ball made of soft clay is dropped and hits the ground

Q32 · Which two quantities are used to calculate the power produced by a car engine?

Q33 · Benzene and glycerine are two substances

Q34 · The diagram shows a vacuum flask containing a hot liquid in a cold room

Q35 · The diagram represents a wave at one moment

Q36 · Which row describes the characteristics of the image of an object formed by a plane…

Q37 · The amplitude of a sound wave decreases and its frequency increases

Q38 · The diagram shows a circuit set up by a student

Q39 · A circuit contains four ammeters P, Q, R and S

Q40 · A mains circuit can safely supply a current of up to 40 A

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