Half-yearly Examination 2015-2016

Integrated Science

Class : S.1 ( ) Max. Mark : 100

Name : _______________________ Date : 20-1-2016

Class No.: ________ Time : 8:45 – 9:45 am

Answer all of the questions on the answer sheet provided.

(A) Multiple Choice (20 marks)

1. An unknown chemical spills on Amy’s arm. What should she do immediately?

(I) Wash her arm under running water. (II) Find out what the unknown chemical is.

(III) Report to the teacher at once.

A. (I) only B. (III) only C. (I) and (III) only D. (II) and (III) only

2. What is the volume of the water in the measuring cylinder shown below?

A. 8.2 cm3 B. 8.6 cm3 C. 9.2 cm3 D. 9.4 cm3

3. Alice is lighting a Bunsen burner, as shown below:

What is going wrong with Alice?

A. She should use a gas lighter instead of a match.

B. Her hand should be placed lower than the top of the chimney.

C. She should open the air hole before lighting the Bunsen burner.

D. She should wear gloves.

4. Kenny has a bottle of corrosive liquid. It gives off harmful vapour. What hazard warning labels should be put on the bottle?

A. (I) and (II) only B. (I) and (III) only C. (II) and (III) only D. (I), (II) and (III)

(I) (II) (III)

5. Choose two suitable methods of mixing solutions in a test tube.

A. (I) and (II) B. (I) and (IV) C. (II) and (III) D. (III) and (IV)

6. Which of the following apparatus measures the volume of a liquid most accurately?

A. Conical flask B. Test tube C. Thermometer D. Measuring cylinder

7. Lily uses a half-metre rule to measure the length of a piece of wood. Which of the following is the BEST way to present the answer?

A. 0.000246km B. 0.246m C. 24.6cm D. 246mm

8. At first, there is 63cm3 of water in a measuring cylinder. David puts a plastic ball into the water. He then observes the new water level is 97cm3. What is the volume of the ball?

A. 34 cm3 B. 160 cm3 C. 63 cm3 D. 29 cm3

9. Terry is going to do an investigation as described below.

Terry

Does sugar dissolve faster in water or oil?

water oil

Which of the following must he do to ensure a fair test?

A. Use a kind of oil that is colourless. B. Do the experiment in a laboratory.

C. Use the same volume of liquids. D. Use beakers as the containers of the liquids.

10. In recording the results of an experiment, we should

A. write anything we want. B. write what the hypothesis or the theory predicts.

C. write what the textbook says. D. write what actually happened.

11. If the results of an experiment do not agree with the prediction, a scientist may

A. change the results to fit the prediction. B. change the design of the experiment and test again.

C. change the record of the observation. D. give up.

12. The set-up below is used to boil water in the laboratory.

Which of the following is the correct drawing of the above set-up?

A. B.

C. D.

13. Which of the following is a characteristic of tree but not a rabbit?

A. Can grow B. Can make its own food C. Can reproduce D. Can move

14. A plant grows towards light, as shown below.

Which of the following common characteristics of living things is shown above?

A. Response to stimuli B. Excretion C. Movement D. Reproduction

15. A fish is a living thing because it

A. has fins and a tail. B. breathes and has scales

C. has cold blood. D. swims and reproduces.

16. Which place most probably does NOT have living things?

A. Pacific Ocean B. The moon C. North Pole D. South Pole

17. Both animal cells and plant cells have

(I) a cell membrane. (II) a cell wall. (III) cytoplasm.

A. (I) and (II) only B. (I) and (III) only C. (II) and (III) only D. (I), (II) and (III)

18. A microscope has an eyepiece of 4x and three objectives of 5x, 10x and 40x. What are the minimum and maximum total magnifications of the microscope?

Minimum total magnification

Maximum total magnification

A.

5x

40x

B.

9x

44x

C.

20x

160x

D.

50x

400x

19. All living things can grow and increase the number of cells by A. cell addition. B. cell subtraction. C. cell division. D. cell attraction.

20. Which of the following descriptions about a cell is INCORRECT? A. All cells are ball-shaped. B. All living things are made up of cells.C. All human cells contain a cell membrane. D. Different kinds of human cells have different uses.

(B) True or False Statements (10 marks)

Write 'T' for a true statement and 'F' for a false one.

Scientists can explain all natural phenomena by doing scientific investigations.

Science is always good because it can improve our living standard.

If you accidentally break a mercury thermometer, you should not touch the mercury or the broken pieces with your hand.

In a fair test, there is only one variable to be changed.

Plants do not excrete.

Living things have special body features that help them adapt to their habitats.

Skin colour has a range of distribution.

Both an animal cell and a plant cell have a cell wall.

The reproduction of Amoeba does not involve any sex cells.

The total magnification of an object seen under micrcoscope is the sum of magnifications of the eyepiece and the objective.

(C) Fill in the blanks (20 marks)

Scientists (a) ______________ things and happenings in nature and ask questions about them.

Alexander Fleming (b) ____________ penicillin in 1928 while Wright brothers (c) ___________ the first aeroplane.

Tom uses a (d)___________________ to transfer a few drops of the liquid to an (e)_____________dish. Then he uses a (f)_________ flame to heat the dish until all water is evaporated.

We should close the air hole before lighting a Bunsen burner. Otherwise, (g)________ __________ may occur.

A (h)_________________ is an instrument for measuring temperature. The unit of temperature is

(i) __________ _____________.

In the laboratory, we can use a (j) __________________ to measure time accurately.

In the first step of a scientific investigation, scientists usually make (k) _____________ and then ask a number of questions. They then propose a (l) _______________. In order to find out if it is correct, they carry out (m) ________________.

When strangers knock at the door, a baby dog (n) __________ to stimuli by barking loudly. Ann teaches the baby dog to (o)___________ urine in her own area.

Deserts are the usual (p) ___________ of camels.

(q) ________________ exist between members of the same species. For example, flowers of the same kind have different sizes.

The image formed in the microscope is (r) ______________ and (s) _______________.

The outermost layer (最外層) of an animal cell is the (t) _______ ___________ .

(D)

1. (a) Suggest an apparatus and draw a sectional diagram for each of the following purposes.

(i) To transfer a small amount of a solid chemical from a bottle to a test tube (2 marks)

(ii) To measure the volume of a liquid (2 marks)

(iii) To stir liquids (2 marks)

(b) Look at the following diagram. What mistakes does the student make? (2 marks)

[Total: 8 marks]

2. Jacky wants to investigate the hotness of a Bunsen flame. He uses the Bunsen burner shown below.

(a) (i) Name parts X and Y. (2 marks)

(ii) He lights the Bunsen burner with the air hole open. Describe what he sees and hears. (2 marks)

(b) Below shows the results of the following experiment.

Position

A

B

C

Time taken for the wire to become red hot (s)

15

5

20

(i) At which position does the wire become red hot most quickly? (1 mark)

(ii) From (i), what conclusion about the Bunsen flame can be drawn? (1 mark)

[Total: 6 marks]

3. Peter has cups of different materials. They are foam cup, plastic cup and paper cup. He wants to find out which cup can keep water warm better.

foam cup plastic cup paper cup

(a) Peter is provided with the following apparatus and materials. How can he use them to carry out the

investigation? Draw his experimental set-up with a labelled sectional diagram of his experiment on the answer sheet. (3 marks) A foam cup A plastic cup A paper cup

Three thermometers 150 cm3 of hot water Three plastic lids

A stopwatch

(b) (i) Give TWO controlled variables in this investigation. (2 marks)(ii) Name the independent variable in this investigation. (1 mark)(iii) What result should he measure? (1 mark)

(c) Peter then carries out the experiment and plots the following graph to represent the results.

Temperature of w

ater in the cups (oC)

Time (min)0 1 2 3 4 5 6 7

10

20

30

40

50

60

70

foam cup

plastic cup

paper cup

(i) What is the initial (最初的) water temperature in the three cups? (1 mark)(ii) Describe the change in water temperature in the three cups over time. (1 mark)(iii) Arrange the three cups in ascending order of the ability of keeping water warm. (1 mark)

[10 marks]

4. Read the following passage and answer the questions that follow.‘I am a frog; I live on the edge of my habitat. I often jump in and out of it. I lay my eggs in the water and they hatch (孵) into tadpoles, which breathe through gills. They grow into frogs and breathe through their lungs. As a frog, I get my dinner from the surrounding land, and I just love slugs. I really hate cold, so I sleep in the pond mud for a long time in winters.’(a) How can the frog breathe when it is a tadpole? (1 mark)(b) What does the frog do in winters? (1 mark)

(c) According to the passage, suggest what the frog’s habitat is. (1 mark)(d) State FIVE characteristics of living things shown in the passage. (5 marks)

[8 marks]5. The following diagrams represent human sex cells.

(a) Name cells A and B. (2 marks)

(b) State TWO differences between cell A and cell B. (2 marks)(c) What types of reproduction involves the fusion of cell A and cell B? Give ONE example of living

things using this type of reproduction. (2 marks)[Total: 6 marks]

6. Jason wants to observe some plant cells under a light microscope.

(a) Before observing the cells, he adds a stain to them. What is the aim of doing this? (2 marks)

(b) (i) He sees a blurred image. To see a clearer image, which TWO parts of the microscope should he

turn? (2 marks)

(ii) The image is too dark. Which TWO parts of the microscope can be adjusted to give more light? (2 marks)

(c) A diagram of a plant cell is given below.

X

Y

(i) Name structures X and Y. (2 marks)

(ii) Most water in the cell is stored in a certain structure. Label this structure on the diagram.

(2 marks)

(d) Calculate the total magnification of microscope if the magnification of eyepiece is 10x and that of objective is 40x. (2 marks)

[Total: 12 marks]

END OF PAPER