Science Section A Upsr

SULIT

1 Section B [20 marks] Answer all questions.

1

Diagram 1 shows a graph of number of elephant found in a jungle in Malaysia. Number of elephant 10 8 6 4 2 O

2004 2005 2006 2007

Year

DIAGRAM 1

(a)

How does the number of elephant change from year 2004 – 2006? [1 mark]

(b)

2

Give one reason for your answer in (a). [1 mark] m (c) (i) Predict the number of elephant in the year 2007 and redraw the bar graph for the year 2007 in Diagram 1 in your answer booklet. [2 marks] m (ii) nState one way to preserve the elephants. [1 mark] m Diagram 2 shows are pictures of grass and animals found in a habitat.

Grass

Caterpillar

Chicken

Rabbit

Eagle

DIAGRAM 2

(a)

Identify an omnivore and a canivore. [1 mark] m (b) Construct a food web based on the pictures in Diagram 2 in your answer booklet. [2 marks] m (c) nPredict what will happen to the population of (i)

caterpillar if all the chickens are killed. m (ii) grass if all the rabbits are killed. m 018 © 2007 Hak cipta Mathematics and Science Tutorial SULIT

[1 mark] [1 mark]

SULIT m 2

3 n100 ml of cold water is poured into a beaker containing 50 ml hot water which was boiled at 100ºC. The temperature of the water in the beaker is recorded for about 10 minutes as shown in Table 1 below. Time (minutes)

0

2

4

6

8

10

Temperature (ºC)

95

90

85

80

75

70

TABLE 1

(a) What is the aim of the investigation? m (b) What is the trend of the change in temperature? m (c) State the following variable (thing) that is

[1 mark] [1 mark]

(i)

manuplated (changed)

[1 mark]

(ii)

responding (measured)

[1 mark]

m m in this investigation. 4

(d) Predict the temperature of the water at the 12th minute. [1 mark] m A student tested four different substances using litmus paper. Table 2 shows the results recorded by the student. Substance

Orange juice

Soap

Colour change of Blue → Red Red → Blue The litmus paper

Vinegar Blue → Red

TABLE 2

(a) Is soap an acidic or alkaline substance? [1 mark] m (b) What is the property of substances that changes the colour of the litmus paper from blue to red? [1 mark] m (c) During the investigation, what did the student (i) manuplated (changed)? m (ii) fixed (kept the same)? m (iii) responded (measured)? m END OF SECTION B 018 © 2007 Hak cipta Mathematics and Science Tutorial

[1 mark] [1 mark] [1 mark] Questions prepared by Noel Roy [NovinVinno] Version ‘07 SULIT m