Cambridge IGCSE Sciences - Co-ordinated (Double) 0654 — 2005 May/June Paper 1 · Variant 1

Question 1

1 An animal is observed swimming in a river. It has legs, but no fins. Its skin is scaly. To which class of vertebrates does this animal belong? A amphibians B fish C mammals D reptiles

Accepted Answer

D

Question 2

2 The diagrams show a normal plant cell, and a cell from the same plant, which has been in a sugar solution for 20 minutes. cell sap normal cell after 20 minutes in sugar solution What explains this change? A The sugar solution is less concentrated than the cell sap. B The sugar solution is more concentrated than the cell sap. C The sugar solution is the same concentration as the cell sap. D The sugar solution has killed the cell.

Accepted Answer

B

Question 3

3 The diagram represents part of the human nervous system. X Y What name is given to X and Y together? A brain B central nervous system C nerve D spinal cord

Accepted Answer

B

Question 4

4 The diagram shows the stages in testing a green leaf for starch. Which liquid is alcohol (methylated spirits)? liquid A liquid B liquid C liquid D leaf heat heat leaf

Accepted Answer

B

Question 5

5 Which word equation represents aerobic respiration? A glucose → carbon dioxide + ethanol B glucose → lactic acid C glucose + oxygen → carbon dioxide + water D glucose + oxygen → lactic acid

Accepted Answer

C

Question 6

6 The diagram shows a section through the heart. 2 3 4 1 Which two blood vessels are arteries? A 1 and 2 B 2 and 3 C 3 and 4 D 4 and 1

Accepted Answer

B

Question 7

7 How do bacteria cause tooth decay? A They release alkalis that dissolve enamel. B They release ethanol that digests enamel. C They release acids that dissolve enamel. D They release enzymes that digest enamel.

Accepted Answer

C

Question 8

8 The diagram shows the alimentary canal of a dog. Where does egestion occur? B A D C

Accepted Answer

B

Question 9

9 Which shows the sequence that occurs when a person becomes aware of light? A impulse → stimulus → receptor → spinal cord B receptor → stimulus → impulse → brain C stimulus → impulse → receptor → spinal cord D stimulus → receptor → impulse → brain

Accepted Answer

D

Question 10

10 The graph shows body temperature before, during and after running a race on a hot day. 38 S temperature / oC R Q T P 37 race race starts ends time Which stage of the graph occurs as a result of homeostasis? A P to Q B Q to R C R to S D S to T

Accepted Answer

D

Question 11

11 The diagram shows a developing fetus attached to the uterus wall. fetus Q uterus wall What is the function of Q? A draining amniotic fluid B passing blood from the mother to the fetus C supplying carbon dioxide to the fetus D supplying oxygen to the fetus

Accepted Answer

D

Question 12

12 Cystic fibrosis is an inherited disease. Only people who are homozygous recessive, ff, suffer from this disease. Which cross could not give rise to a child suffering from cystic fibrosis? A FF x ff B Ff x Ff C Ff x ff D ff x ff

Accepted Answer

A

Question 13

13 What is an ecosystem? A a community and its habitat B a group of organisms and their predators C all organisms in a food chain D where an organism lives and breeds

Accepted Answer

A

Question 14

14 What do the chemical symbols N2 and Ni represent? N2 Ni A a compound a compound B a compound an element C an element a compound D an element an element

Accepted Answer

D

Question 15

15 The diagram shows a circuit. Solid X makes the lamp light. lamp X What is solid X? A copper B rubber C silicon(IV) oxide D sulphur

Accepted Answer

A

Question 16

16 Large hydrocarbons can be .….X….. to make smaller, more useful molecules. Small molecules can be …..Y….. to make long molecules. What are X and Y? X Y A cracked distilled B cracked polymerised C distilled polymerised D distilled cracked

Accepted Answer

B

Question 17

17 A concentrated solution of a sugar is separated from a dilute solution of this sugar by a partially permeable membrane. Sugar molecules are bigger than water molecules. dilute solution concentrated of sugar solution of sugar partially permeable membrane After one hour, the concentration of each solution has changed. The reason is that more …..1.…. molecules pass to the …..2….. than to the …..3.…. Which words correctly fill gaps 1, 2 and 3? 1 2 3 A sugar left right B sugar right left C water left right D water right left

Accepted Answer

C

Question 18

18 Carbon is used in the extraction of some metals from their ores because 1  carbon forms strong alloys with metals, 2  carbon reacts with oxygen in the ore. Which of these statements are correct? A 1 only B 2 only C both 1 and 2 D neither 1 or 2

Accepted Answer

B

Question 19

19 Soap solution is gradually added to separate samples of water P, Q, R and S until a lather forms. P Q R S distilled boiled distilled hard tap boiled hard water water water tap water How does boiling affect the volume of soap solution needed for a lather? P to Q R to S A no change no change B no change S needs less C Q needs more no change D Q needs more S needs less

Accepted Answer

B

Question 20

20 Dilute sulphuric acid is added to antacid tablets in the apparatus shown. dilute sulphuric acid limewater antacid tablets The limewater turns milky. What do the antacid tablets contain? A magnesium B magnesium carbonate C magnesium hydroxide D magnesium oxide

Accepted Answer

B

Question 21

21 Which unit of time is most useful in describing the ages of rocks? A tens of years B hundreds of years C thousands of years D millions of years

Accepted Answer

D

Question 22

22 An increase in the world’s population increases the demand for food. Which industrial process helps to increase food production? A chlorination of water B distillation of petroleum to form petrol C manufacture of ammonium sulphate D recycling of glass bottles

Accepted Answer

C

Question 23

23 A student uses the apparatus shown to find out how many different pigments are in leaves. glass cover beaker absorbent paper solvent spot of extract from leaf What is this separation method called? A chromatography B distillation C evaporation D filtration

Accepted Answer

A

Question 24

24 The contents of a beaker scatter a beam of light What does the beaker contain? A aqueous copper(II) sulphate B ethanol C milk D water

Accepted Answer

C

Question 25

25 Which of the following is a solid fossil fuel? A coal B oil C sugar D wood

Accepted Answer

A

Question 26

26 The diagrams show an investigation into the conditions needed for rusting of iron nails. 1 2 3 4 oil layer nail nail and nail and nail in and salty drying boiled water water agent water The nails in tubes 1 and 2 rust within a few days. Which conditions are required for rusting? A air alone B air and water C salt and water D water alone

Accepted Answer

B

Question 27

27 Which ion gives a white precipitate both with aqueous sodium hydroxide and with aqueous ammonia? A Cu2+(aq) B Fe2+(aq) C Fe3+(aq) D Zn2+(aq)

Accepted Answer

D

Question 28

28 A decorator wishes to calculate the area of a bathroom tile so that he can estimate the amount of adhesive which he needs to buy. What must he use? A a measuring cylinder only B a ruler only C a measuring cylinder and a clock only D a measuring cylinder and a ruler only

Accepted Answer

B

Question 29

29 A car accelerates from traffic lights. The graph shows how the car’s speed changes with time. speed m / s 20 0 0 10 time / s How far does the car travel before it reaches a steady speed? A 10 m B 20 m C 100 m D 200 m

Accepted Answer

C

Question 30

30 Objects with different masses are hung on a 10 cm spring. The diagram shows how much the spring stretches. 10 cm 20 cm 30 cm 100 g M The extension of the spring is directly proportional to the mass hung on it. What is the mass of object M? A 110 g B 150 g C 200 g D 300 g

Accepted Answer

C

Question 31

31 A ball is released from rest and rolls down a track from the position shown. What is the furthest position the ball could reach? ball C starts here B D A

Accepted Answer

B

Question 32

32 A farmer has two carts. The carts have the same weight, but one has narrow wheels and the other has wide wheels. narrow wheel wide wheel In rainy weather, which cart sinks less into soft ground, and why? cart wheels why A narrow greater pressure on the ground B narrow less pressure on the ground C wide greater pressure on the ground D wide less pressure on the ground

Accepted Answer

D

Question 33

33 A measured mass of gas is placed in a cylinder at atmospheric pressure and is then slowly compressed. piston gas piston pushed in The temperature of the gas does not change. What happens to the pressure of the gas? A It drops to zero. B It decreases, but not to zero. C It stays the same. D It increases.

Accepted Answer

D

Question 34

34 An iron bar is held with one end in a fire. The other end soon becomes too hot to hold. hand fire iron bar How has the heat travelled along the iron bar? A by conduction B by convection C by expansion D by radiation

Accepted Answer

A

Question 35

35 The drawing shows a wave. Which labelled distance is the wavelength? A B D C

Accepted Answer

C

Question 36

36 Which diagram correctly shows a ray of light passing through a rectangular glass block? A B C D

Accepted Answer

A

Question 37

37 In which circuit does the voltmeter read the potential difference across the lamp? A B V V C D V V

Accepted Answer

D

Question 38

38 In the circuit below, X and Y are identical 6 V lamps. 6 V switch X Y What happens when the switch is closed? A X lights more brightly than Y. B Y lights more brightly than X. C X and Y light with equal brightness. D Neither X nor Y light.

Accepted Answer

C

Question 39

39 Which type of radiation produces the most ionisation? A alpha-particles B beta-particles C gamma-rays D all produce the same amount

Accepted Answer

A

Question 40

40 A powder contains 400 mg of a radioactive material which emits alpha-particles. The half-life of the material is 5 days. What mass of that material remains after 10 days? A 0 mg B 40 mg C 100 mg D 200 mg

Accepted Answer

C

Question paper20 pages

Mark scheme4 pages

Questions as text

Q1 · An animal is observed swimming in a river

Q2 · The diagrams show a normal plant cell, and a cell from the same plant, which has been in…

Q3 · The diagram represents part of the human nervous system

Q4 · The diagram shows the stages in testing a green leaf for starch

Q5 · Which word equation represents aerobic respiration?

Q6 · The diagram shows a section through the heart

Q7 · How do bacteria cause tooth decay?

Q8 · The diagram shows the alimentary canal of a dog

Q9 · Which shows the sequence that occurs when a person becomes aware of light?

Q10 · The graph shows body temperature before, during and after running a race on a hot day

Q11 · The diagram shows a developing fetus attached to the uterus wall

Q12 · Cystic fibrosis is an inherited disease

Q13 · What is an ecosystem?

Q14 · What do the chemical symbols N2 and Ni represent?

Q15 · The diagram shows a circuit

Q16 · Large hydrocarbons can be .….X….

Q17 · A concentrated solution of a sugar is separated from a dilute solution of this sugar by a…

Q18 · Carbon is used in the extraction of some metals from their ores because 1 carbon forms…

Q19 · Soap solution is gradually added to separate samples of water P, Q, R and S until a…

Q20 · Dilute sulphuric acid is added to antacid tablets in the apparatus shown

Q21 · Which unit of time is most useful in describing the ages of rocks?

Q22 · An increase in the world’s population increases the demand for food

Q23 · A student uses the apparatus shown to find out how many different pigments are in leaves

Q24 · The contents of a beaker scatter a beam of light What does the beaker contain?

Q25 · Which of the following is a solid fossil fuel?

Q26 · The diagrams show an investigation into the conditions needed for rusting of iron nails

Q27 · Which ion gives a white precipitate both with aqueous sodium hydroxide and with aqueous…

Q28 · A decorator wishes to calculate the area of a bathroom tile so that he can estimate the…

Q29 · A car accelerates from traffic lights

Q30 · Objects with different masses are hung on a 10 cm spring

Q31 · A ball is released from rest and rolls down a track from the position shown

Q32 · A farmer has two carts

Q33 · A measured mass of gas is placed in a cylinder at atmospheric pressure and is then slowly…

Q34 · An iron bar is held with one end in a fire

Q35 · The drawing shows a wave

Q36 · Which diagram correctly shows a ray of light passing through a rectangular glass block?

Q37 · In which circuit does the voltmeter read the potential difference across the lamp?

Q38 · In the circuit below, X and Y are identical 6 V lamps

Q39 · Which type of radiation produces the most ionisation?

Q40 · A powder contains 400 mg of a radioactive material which emits alpha-particles

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