section b test

7/28/2019 Section B Test

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Section B(1)

[20 marks]Answerall questions

[The time suggested to complete this section is 30 minutes]

7.Diagram shows pictures of animals P ,Q , R,and S.

Observe the animals in Diagram .

Based on your observations,

a) State one characteristic of animals P, Q, R, and S.

P:

Q: ...

R:

S:

(4 marks)


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b) Classify animals P, Q, R and S into two groups based on commancharacteristics

Commoncharacteristics

Namesofthe

animals

P, Q, R, and S,

Group 1 Group 2

[4 marks]


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8. A student found that when he wears a darker coloured shirt and steps into the sunrays, he feels hotter and sweats more as shown in figure.

a) i) Based on the observations given, state the difference in the amount of heat receivedby the student in Situation A and Situation B.

(1 mark)

ii)State one hypothesis based on the observation in (a)

(1 mark)

b) A student carried out an experiment to investigate the situation.Diagram belowshowsthe arrangement of appratus for the experiment.

Situation A Situation B


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Procedure:

1. The initial temperature of the water in each of the two tins is recorded.2. The Bunsen burner is lighted and left burning for 15 minutes.3. The final temperature of the water in each of the two tins is recorded.

i)Record the temperature readings in the spaces provided.

(2 marks)

ii) Complete table by recording the temperature readings for the respective tin.

TinTemperature / C

Initial Final Rise

X

Y

(2 marks)


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(c) Based on readings draw a bar chart which shows the temperature with thedifference surface.

X Y

(d) State the variables involved in this experiment.

Manipulated variable

Responding variable

Controlled variable

(3 marks)(e) Based on the experiment,state the relationship between the brightness of

the surface and the amount of the heat absorbed.

. (1 mark)

END OF QUESTION PAPER

Temperaturerises /0C

Type of surface (2marks)


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Section B(2)

[ 20 marks ]

7. Diagram 7 shows the picture of plants P , Q , R, S and T that undergoes

vegetative

reproduction.

P

Q R

S

T

Diagram 7

a. Observe the plants in Diagram 7.Based on your observation in Diagram 7, state the method of reproduction of any four

plants ,

P, Q , R , S and T.

P : ___________________________________________________________________

Q : ___________________________________________________________________

R : ___________________________________________________________________

S : ______________________________________________________________

T : ______________________________________________________________

[ 4 marks ]


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b. Classify the plants P , Q , R , S and T into two groups based on their vegetative

parts of the plants.

[ 4 marks ]

P, Q, R, S, T

Group 1 Group 2

Vegetativeparts of the

plants

Letters of

the plants


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8. a. Diagram 8.1 shows a giraffe standing in two different positions at different

times.

Position A Position B

Diagram 8.1

i. Based on your observation in Diagram 8.1 , state the difference in

stability of giraffe when it standing in position A and B.

______________________________________________________________

______________________________________________________________

[ 1 mark ]

ii. What inference can be made based on the standing position of A and B

in Diagram 8.1 ?

_____________________________________________________________

_____________________________________________________________

[ 1 mark ]

iii. State one hypothesis based on your observation in Diagram 8.1

_____________________________________________________________

_____________________________________________________________[ 1 mark ]


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b. The student carried out an experiment to investigate the situations in Diagram

8.1. Diagram 8.2 shows the experiment set-up of the apparatus used.

Diagram 8.2

The student takes the following steps.

Step 1 : Model T is placed in front of a table fan. The distance between

model T and the fan is 120 cm.Step 2 : The fan is switched on at the speed of 1 and a stopwatch is set on

at

the same time.

Step 3. : The time taken for model T to fall is recorded.

Step 4 : Steps 1 to 3 are repeated for models U and V.

6 cm 5 cm

8 cm

10 cm

9 cm


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i. Record the time taken for models T , U and V to fall in the spaces

provided.

The time taken for the model T to

fall = ________________ ( s )

The time taken for the model U to

fall = ________________ ( s )

The time taken for the model V to

fall = ________________ ( s )

[ 3 marks ]

ii. Complete Table 8.1 by recording the base area of models T , U and V the

stopwatch readings.

Table 8.1

[ 1 mark ]

Model T U V

2

Base area ( cm )

Stopwatch readings (s )


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c. Based on the readings in Table 8.1 , draw bar chart to show the time taken for the

models to fall.

[ 2 marks ]

Time takenfor the model

to fall (s )

T U V

Model


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d. State the variables involved in this experiment .

Manipulated variable

Responding variable

[ 2 marks ]

e. Based on the experiment, state the relationship between the base area of an object

and its stability.

____________________________________________________________________

____________________________________________________________________

[ 1 mark ]

END OF QUESTION PAPER

section b test

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