Scf1 Test 1.ms.docx

PENANG CHINESE GIRLS’ HIGH SCHOOL FIRST TEST (MAC) 2019 SCIENCE FORM 1

DURATION: 1 HOUR

NAME:_________________________________(

)

CLASS:____________

INSTRUCTIONS

1.

2.

Do not open this examination paper until you are told to do so.

Write your name, class number and class in the space provided.

1

Question

Full marks

1

5

2

6

3

6

4

6

Marks obtained

3.

This question paper consists of 7 questions.

4.

5.

Answer ALL the questions in the space provided.

5

7

6

10

7

10

Total marks

50

Hand in this question paper to the invigilator at the end of the examination.

__________________This paper consists of 10 printed pages_____________________

2

1.

a) Name the following apparatus.

Retort stand Bunsen burner

[2marks]

b) Each pupil were given the same book of the same size and same weight. They were asked to make several measurement.

Diagram 1

i)

Suggest a suitable measuring tool(s) to measure the thickness of a sheet of paper. Micrometer screw gauge [1mark]

ii)

Explain the method to measure the weight of a single sheet of paper. Measure the weight of the whole sheets of paper. Then the reading divided by the number of sheets . [2marks]

3

2. Tick (/) for the true statement(s) and cross (x) for the false statement(s).

a) Before setting up the experiment, one must have the hypothesis.

/

b) There are two types of variables to be considered.

X

c) To get a more accurate data, one must repeat the procedure.

/

d) Plotting a graph is one way of interpreting data.

/

e) A hypothesis can be made after the data has been analysed.

X

f) One must change to passive sentence when writing a report.

/ [6marks]

3. Diagram 2 shows a method of measuring length.

X

c m

0

1

2

6

Diagram 2

3

4

5

(a) What is the length of the pencil shown in Diagram 2? 1.9cm [1mark]

(b) Mark ‘X’ in the box provided on Diagram 2 to show the correct position of the eye in taking the reading. [1mark]

(c) A student carried out an activity to measure the length of the curve shown in Diagram 3. The results are shown in Table 1. Diagram 3

Reading Length of curved line (cm)

1

2

3

8.6

8.8

8.7

Table 1 (i) How would you measure the length of the curved line? By using a thread Placed the thread on the ruler. [1mark] (ii) Why did the student take three readings? To take the average reading [1mark] (iii) Based on Table 1, what is the length of the curved line? (8.6+8.8+8.7) ÷ 3= 8.7cm [2marks]

2.

A pupil conduct an experiment by adding marbles into a polystyrene container which has been placed on the water. Table 2 shows the result from the observation of the expe Number of marbles

Depth of polystyrene container in the water

0

5

10 Table a)

2

From Table 2, state the relationship between mass and density. The bigger the mass, the higher the density. [1mark]

b)

Suggest a method to the pupil to make the polystyrene container with 10 marbles to float higher. Put the marbles into a bigger container Replaced the water with higher density solution [2marks]

c)

If the same polystyrene container with 10 marbles was to be placed in a concentrated salt solution. i)

Predict the outcome. It will float [1mark]

ii ) Explain your answer in 4(c)(i). The density of the salt solution is lesser than the water [2marks] 3.

5. Diagram 4 shows measuring apparatus P and Q.

P: …spring balance.

Q: level balance.

Diagram 4

(a) On Diagram 4, label P and Q. [1mark]

(b) (i) Which measuring tool will give different results when measuring activities are conducted in two different places, at the Equator and at the North Pole? Q [1mark] (ii) Give a reason for your answer in 5(b)(i). Q will be affected by gravitational force. Force at equator bigger than the north pole.

[2marks]

(c) (i) If an astronaut has a mass of 70 kg on Earth. What will be his mass in space? 70kg

[1mark]

(ii) Explain your answer in 5(c)(i). Mass is a scalar quantities. It only has magnitude and has no direction. [2marks]

6.

A pupil carried out an experiment to determine the time taken for one complete swing of a pendulum as shown in Diagram 5. The time taken for 10 complete swings is recorded and the experiment is repeated using strings of different lengths

Diagram 5 (a) Table 3 shows the time taken for 10 complete swings for various length of strings. Complete Table 3 by calculating the time taken for one complete swing. Table 3 Length of pendulum (cm)

10

20

30

40

50

Time taken for 10 complete swings (s)

10

15

18

20

22

Time taken for 1 complete swing (s)

1.0

1.5

1.8

2.0

2.2

[2marks]

(b) Based on the data in Table 3, plot a graph of time taken for one complete swing against the length of pendulum.

Time taken for one complete swing (s)

33.0

2.0

1.0

10

20

30

40

50

60

Length of pendulum(cm) (cm)

[2marks] (c) Predict the time taken for one complete swing when the length of the string is 25cm. 1.3s - 1.4s _______________________________________________________________ [1mark]

(d) Diagram 6 shows a scene at the playground. The three children on the swings are trying to solve a problem of who can swing the fastest. Child D suggests that the length affects the time taken while child F thinks that it has to do with their mass. (Note: child D and E have the same mass)

D

E

F

Diagram 6

(i) Do you agree with child F? Why? No because time taken for a complete swing does not affect by mass, the string.

only thelength of

[2marks]

(ii) Who do you think will swing the fastest? Why? F because he has the shortest swing. [2marks]

(iii) Rearrange the children from the slowest to the fastest in their swing. E

D

F

[1mar)

7. Thread

Thread

Aluminium lump

Aluminium lump

36ml

30ml

Diagram 7

(a) Name the method used in Diagram 7? Water displacement methods [1mark] (b) (i) Can the volume of the cork be obtained directly without using the aluminium lump? No

[1mark]

(ii) Explain your answer in 7(b)(i). Cork has lesser density and it will float thus water will not be displace [1mark]

(c) If the aluminium lump has a mass of 81 g, calculate its density. Density = 81g ÷ 6 ml = 13.5 g/ml [2marks]

(d) Is the method in 7(a) can be used to determine the volume of three cubes of sugar? Explain your answer. No because it will dissolve in the water.

[2marks]

Any Three layered drink will do... As long as they can mention one liquid is less dense than the other so it will be on top. Vice versa