Cambridge IGCSE Sciences - Co-ordinated (Double) 0654 — 2017 Oct/Nov Paper 2 · Variant 3

Question 1

1 What is homeostasis? A the maintenance of the body’s external environment B the maintenance of the body’s internal environment C the processes that produce heat in the body D the removal of wastes from the body

Accepted Answer

B

Question 2

2 What is excretion? A breakdown of materials in kidney cells B chemical reactions in liver cells C removal of undigested food from the gut D removal of waste products

Accepted Answer

D

Question 3

3 Aerobic respiration is summarised below. glucose + oxygen → carbon dioxide + water How many molecules of carbon dioxide will be produced from the breakdown of four molecules of glucose? A 4 B 8 C 16 D 24

Accepted Answer

D

Question 4

4 Which statements about X chromosomes in humans are correct?

present in present in
body cells in body cells of carry genes
males females
A v v v
B v x v
Cc J x x
D x v x

Accepted Answer

A

Question 5

5 The diagram shows a section through a root hair cell. How is the structure of the root hair cell related to its function? A The nucleus is not at the centre of the cell. B The shape helps to support the plant. C The surface area is large. D The volume of the vacuole is small.

Accepted Answer

C

Question 6

6 What is meant by fertilisation? A combining of male and female nuclei B joining of male and female sex organs C movement of sperms through the uterus to an ovum D reproduction

Accepted Answer

A

Question 7

7 When a suspension of powdered milk is completely digested by a protease enzyme it becomes clear. The graph shows the time taken for a mixture of protease and powdered milk to clear at different temperatures. time for mixture to clear 0 10 20 30 40 50 temperature / °C What is this enzyme’s optimum temperature? A 5 °C B 37 °C C 40 °C D 50 °C

Accepted Answer

C

Question 8

8 Which row correctly matches the form of malnutrition with its possible outcome? form of malnutrition possible outcome A energy intake is greater than energy use obesity B high fat intake constipation C lack of dietary fibre starvation D lack of fat intake coronary heart disease

Accepted Answer

A

Question 9

9 Which organisms obtain energy directly from every trophic level? A carnivores B decomposers C herbivores D producers

Accepted Answer

B

Question 10

10 In the geotropic and phototropic responses of a plant shoot, does the shoot grow towards or away from the stimulus? geotropism phototropism A away from away from B away from towards C towards away from D towards towards

Accepted Answer

B

Question 11

11 Which part of a seed is not part of a plant embryo? A cotyledon B plumule C radicle D testa

Accepted Answer

D

Question 12

12 The graph shows how the pH of a lake has changed from 1600 to 2000. 7 6 pH 5 4 1600 1700 1800 1900 2000 year What would have contributed to the change from 1900 onwards? A burning of coal in nearby power stations B increasing global temperatures C increased growth of algae in the lake D the use of pesticides on nearby fields

Accepted Answer

A

Question 13

13 In a species of plant, the allele for yellow flowers is dominant to the allele for red flowers. Two heterozygous yellow-flowered plants are crossed. Which offspring are produced? A 25% with yellow flowers, 75% with red flowers B 50% with yellow flowers, 50% with red flowers C 75% with yellow flowers, 25% with red flowers D 100% with yellow flowers

Accepted Answer

C

Question 14

14 Which row describes the melting point and boiling point of salt water? melting point / °C boiling point / °C A 0 less than 100 B 0 100 C less than 0 more than 100 D more than 0 100

Accepted Answer

C

Question 15

15 When solid zinc carbonate is heated, a different solid and a gas are formed. Which type of change occurs? A chemical B exothermic C physical D separation

Accepted Answer

A

Question 16

16 Dilute hydrochloric acid is added to aqueous sodium hydroxide in a non-insulated beaker. The temperature of the mixture increases. Which statement is not correct? A The reaction is exothermic. B There is a reduction in the amount of chemical energy. C There is an increase in the amount of thermal energy. D There is no energy loss from the mixture.

Accepted Answer

D

Question 17

17 Ammonia is oxidised as shown. platinum wire ammonia oxides of nitrogen + + air water vapour heat The platinum is chemically unchanged at the end of the reaction. What is the reason for using platinum? A to absorb the heat from the reaction B to filter out oxygen from the air C to increase the rate of the reaction D to neutralise the ammonia

Accepted Answer

C

Question 18

18 The ionic equation for the formation of chromium(III) ions is shown. Cr  →  Cr3+  +  3e– Which statement about chromium atoms is correct? A They are oxidised by gaining electrons. B They are oxidised by losing electrons. C They are reduced by gaining electrons. D They are reduced by losing electrons.

Accepted Answer

B

Question 19

19 Which substances react with dilute sulfuric acid to form a salt?

magnesium
oxide

magnesium
carbonate

magnesium
chloride

magnesium

v v

~*~ KKK

v x
x v
v v

Accepted Answer

A

Question 20

20 Element X has two outer-shell electrons. Element Y has seven outer-shell electrons. Which statement about X and Y is not correct? A Element X combines with element Y to form an ionic compound. B Element X combines with element Y to form a solid compound which conducts electricity. C Element X conducts electricity and element Y is in Group VII of the Periodic Table. D Element X is in Group II of the Periodic Table and element Y does not conduct electricity.

Accepted Answer

B

Question 21

21 The melting points of three elements in Group I and of three elements in Group VII are shown. element group melting point (°C) lithium I 179 sodium I 98 potassium I 64 chlorine VII –101 bromine VII –7 iodine VII 114 What is the trend in reactivity in each group as melting point increases? change in Group I change in Group VII reactivity reactivity A less reactive less reactive B less reactive more reactive C more reactive less reactive D more reactive more reactive

Accepted Answer

A

Question 22

22 Underwater pipes made from steel are prevented from rusting by sacrificial protection. Sacrificial protection uses a ««1«« reactive metal attached to the pipes which is ««2«« in preference to the steel. Which words complete gaps 1 and 2? 1 2 A less oxidised B less reduced C more oxidised D more reduced

Accepted Answer

C

Question 23

23 Which row describes how hydrogen and nitrogen are obtained for use in the Haber process? hydrogen nitrogen A electrolysis of sulfuric acid catalytic reduction of nitrogen oxides B electrolysis of sulfuric acid distillation of air C reaction of methane and steam catalytic reduction of nitrogen oxides D reaction of methane and steam distillation of air

Accepted Answer

D

Question 24

24 In the Contact process, sulfur trioxide is absorbed by concentrated sulfuric acid and then diluted with water. Which statement about the reaction between sulfur trioxide and water explains why sulfur trioxide is not dissolved directly in water? A A catalyst is required. B It is a slow reaction. C It is endothermic and produces a sulfuric acid mist. D It is exothermic and produces a sulfuric acid mist.

Accepted Answer

D

Question 25

25 Which word equation describes the manufacture of lime from limestone? A calcium carbonate  →  calcium hydroxide  +  carbon dioxide B calcium carbonate  →  calcium oxide  +  carbon dioxide C calcium hydroxide  →  calcium oxide  +  water D calcium oxide  +  carbon dioxide  →  calcium carbonate

Accepted Answer

B

Question 26

26 The structures of four compounds are shown. 1 2 3 4 H H H H H H H H H C C H H C C C H C C O H H C H H H H H H H H Which types of compound do these structures represent? 1 2 3 4 A alcohol alkene alkane alcohol B alkane alcohol alkene alkane C alkane alkene alcohol alkane D alkene alkane alcohol alkene

Accepted Answer

C

Question 27

27 Which process is used to make ethanol? A Addition of oxygen to ethene in the presence of a catalyst. B Addition of oxygen to ethene with no catalyst. C Addition of steam to ethene in the presence of a catalyst. D Addition of steam to ethene with no catalyst.

Accepted Answer

C

Question 28

28 A car moves with a constant speed of 15 m / s along a road for 20 s. After this, the car is 100 m from where it started, measured in a straight line. Which statement about the car is correct? A It has travelled a distance of 100 m along the road. B It has travelled a distance of 300 m along the road. C Its direction was constant. D Its velocity was constant.

Accepted Answer

B

Question 29

29 A worker carries bricks up a ladder. The following quantities are known. ● the height the bricks are lifted up ● the time taken for the worker to lift the bricks ● the volume of the bricks ● the weight of the bricks Which quantities are needed to calculate the useful power produced by the worker as he carries the bricks up the ladder? A height, time and volume B height, time and weight C height, volume and weight D time, volume and weight

Accepted Answer

B

Question 30

30 The pressure P of a fixed mass of gas at constant temperature depends on its volume V. What is the relationship between P and V ? A P is directly proportional to V. B P is directly proportional to V 2. C P is inversely proportional to V. D P is inversely proportional to V 2.

Accepted Answer

C

Question 31

31 Four blocks are made from different materials. The blocks are heated and the thermal energy of each block increases by the same amount. The temperature increase of each block is shown in the diagrams. Which block has the smallest thermal capacity? A B C D temperature temperature temperature temperature increase = 3 °C increase = 6 °C increase = 9 °C increase = 12 °C

Accepted Answer

D

Question 32

32 One type of double glazing consists of two panes of glass separated by a vacuum. glass glass vacuum Which methods of energy transfer are prevented by the vacuum? A conduction and convection only B conduction and radiation only C convection and radiation only D conduction, convection and radiation

Accepted Answer

A

Question 33

33 A water wave travels at a steady speed of 4.0 m / s and passes a stationary boat. boat wave direction wave crest Four wave crests pass the boat every 2.0 seconds. What is the wavelength of the waves? A 0.5 m B 1.0 m C 2.0 m D 8.0 m

Accepted Answer

C

Question 34

34 A student uses a converging lens to obtain a magnified, virtual image of an object. The object is in the position shown in the diagram. A principal focus of the lens is also shown on each side of the lens. At which labelled position is the image formed? converging lens object A B principal focus principal focus C D

Accepted Answer

A

Question 35

35 Which radiations are included in the electromagnetic spectrum? A α-particle radiation and β-particle radiation B α-particle radiation and γ-rays C β-particle radiation and infra-red radiation D γ-rays and infra-red radiation

Accepted Answer

D

Question 36

36 The diagram represents a wave in air. Molecules are closer together in region P than they are in region Q. region P region Q wave direction Which type of wave is represented, and in which direction do the molecules vibrate? direction type of wave of vibration A longitudinal B longitudinal C transverse D transverse

Accepted Answer

A

Question 37

37 The diagram shows a 3.0 Ω resistor connected to a 6.0 V battery. 6.0 V 3.0 Ω How much energy is transferred in the 3.0 Ω resistor in 30 seconds? A 15 J B 60 J C 360 J D 540 J

Accepted Answer

C

Question 38

38 Three charged balls P, Q and R are suspended by insulating threads. Ball P is negatively charged. Ball Q is brought close to ball P. The balls move away from each other. insulating thread P – Q Ball Q is now brought close to ball R. The balls move closer to each other. Q R What are the signs of the charges on ball Q and ball R? ball Q ball R A negative negative B negative positive C positive negative D positive positive

Accepted Answer

B

Question 39

39 An engineer wishes to make a d.c. circuit that will switch on a lamp automatically at night. She uses a light-dependent resistor (LDR) in the circuit, and a component that allows a large current to be controlled by a small current. What happens to the resistance of the LDR as it becomes dark, and what is a suitable component to allow a large current to be controlled by a small current? resistance suitable of LDR component A decreases relay B decreases transformer C increases relay D increases transformer

Accepted Answer

C

Question 40

40 The diagrams represent pairs of nuclei of some atoms. Which pair shows nuclei of different isotopes of the same element? A B key neutron proton C D

Accepted Answer

B

Question paper20 pages

Mark scheme3 pages

Questions as text

Question 1

Question 2

Q3 · Aerobic respiration is summarised below

Q4 · Which statements about X chromosomes in humans are correct?

Q5 · The diagram shows a section through a root hair cell

Q6 · What is meant by fertilisation?

Q7 · When a suspension of powdered milk is completely digested by a protease enzyme it becomes…

Q8 · Which row correctly matches the form of malnutrition with its possible outcome?

Q9 · Which organisms obtain energy directly from every trophic level?

Q10 · In the geotropic and phototropic responses of a plant shoot, does the shoot grow towards…

Q11 · Which part of a seed is not part of a plant embryo?

Q12 · The graph shows how the pH of a lake has changed from 1600 to 2000

Q13 · In a species of plant, the allele for yellow flowers is dominant to the allele for red…

Q14 · Which row describes the melting point and boiling point of salt water?

Q15 · When solid zinc carbonate is heated, a different solid and a gas are formed

Q16 · Dilute hydrochloric acid is added to aqueous sodium hydroxide in a non-insulated beaker

Q17 · Ammonia is oxidised as shown

Q18 · The ionic equation for the formation of chromium(III) ions is shown

Q19 · Which substances react with dilute sulfuric acid to form a salt?

Q20 · Element X has two outer-shell electrons

Q21 · The melting points of three elements in Group I and of three elements in Group VII are…

Q22 · Underwater pipes made from steel are prevented from rusting by sacrificial protection

Q23 · Which row describes how hydrogen and nitrogen are obtained for use in the Haber process?

Q24 · In the Contact process, sulfur trioxide is absorbed by concentrated sulfuric acid and…

Q25 · Which word equation describes the manufacture of lime from limestone?

Q26 · The structures of four compounds are shown

Q27 · Which process is used to make ethanol?

Q28 · A car moves with a constant speed of 15 m / s along a road for 20 s

Q29 · A worker carries bricks up a ladder

Q30 · The pressure P of a fixed mass of gas at constant temperature depends on its volume V

Q31 · Four blocks are made from different materials

Q32 · One type of double glazing consists of two panes of glass separated by a vacuum

Q33 · A water wave travels at a steady speed of 4.0 m / s and passes a stationary boat

Q34 · A student uses a converging lens to obtain a magnified, virtual image of an object

Q35 · Which radiations are included in the electromagnetic spectrum?

Q36 · The diagram represents a wave in air

Q37 · The diagram shows a 3.0 Ω resistor connected to a 6.0 V battery

Q38 · Three charged balls P, Q and R are suspended by insulating threads

Q39 · An engineer wishes to make a d.c

Q40 · The diagrams represent pairs of nuclei of some atoms

What was in this paper

What you needed in this session

Other variants, same session

This paper, other years