UJIAN 1 2015SAINS Tingkatan 5

1. Table 1 shows the results of an experiment studying the effect of temperature on bacterial growth.

( Jadual 1 menunjukkan keputusan eksperimen mengkaji kesan suhu ke atas pertumbuhan bakteria)

Petri dishes(Piring petri)

Temperature (oC)(Suhu (oC)

Number of bacterial colonies

(Bilangan coloni bakteria)1 10 22 20 53 30 94 40 105 50

........................6 60 0

(a) Based on Table 1, draw a graph to show the relationship between the number of bacterial colonies and temperature .(Berdasarkan pada Jadual 1, lukis graf yang menunjukkan hubungan antara bilangan koloni bakteria terhadap suhu)

[2 markah]

TABLE 1(JADUAL 1)

Temperature (oC)(Suhu oC)

605030 402010

2

00

12

10

4

8

0

6

Number of bacterial colonies(Bilangan koloni bakteria)

(b) Based on the graph, state the number of bacterial colonies at 500 C in Table 1(Berdasarkan graf, nyatakan bilangan koloni bakteria pada suhu 500 C dalam Jadual 1)

[1 mark]

(c) What is the hypothesis of this experiment?.(Apakah hipotesis bagi eksperimen ini?)

..........................................................................................................................................................[1 mark]

(d) Write down one inference that can be made from the observation in Table 1.(Tuliskan satu inferens yang boleh dibuat berdasarkan pemerhatian pada Jadual 1)

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[1 mark]