NAMA: ......................................................................... TING:.......................................................................... PAPER 2 / BAHAGIAN B 1 Diagram 3 shows an experiment to study the reaction of metal P with dilute hydrochloric acid. (Rajah 3 menunjukkan satu eksperimen untuk mengkaji tindakbalas logam P dengan asid hidroklorik cair)

dilute hydrochloric acid (Asid hidroklorik cair)

gas

5 g metal P (5 g logam P) Water (Air)

DIAGRAM 3

The volume of gas collected is recorded every minute for six minutes. Table 3 shows the results of the experiment. (Isipadu gas yang dipungut direkod setiap minit dalam masa enam minit. Jadual 3 menunjukkan keputusan eksperimen ) Time (minutes) Masa (minit) Volume of gas collected (cm3) Isipadu gas (cm3) 1 2 3 4 5 6

15

30

37.5

41

42.5

43

TABLE 3

1

(a)

State the variables in this experiment. (Nyatakan pembolehubah dalam eksperimen ini ) Pembolehubah dimanipulas (MV):................................................................ Pembolehubah bergerakbalas (RV):............................................................. Pembolehubah dimalarkan (FV):.................................................................. (b) [1mark] Based on Table 3, draw a graph of the volume of gas against time. (Berdasarkan Jadual 3, lukiskan graf isipadu gas melawan masa )

Volume of gas (cm3) (Isipadu gas (cm3)) 40

35

30

25

20

15

1

2

3

4

5

6 Time (minutes) (Masa minit)

[2 marks]

2

(c)

What is the relationship between the volume of gas given off and the reaction time in the first two minutes? (Apakah hubungan antara isipadu gas yang terhasil dengan masa tindak balas bagi dua minit pertama?)

. ................................................................................................................................ [1 mark ] (d) Predict the volume of gas collected at the eighth minute. (Ramalkan isipadu gas yang dikumpul pada masa lapan minit .)

. [1 mark ] (e) State the operational definition for reaction of metal (Nyatakan definisi secara operasi bagi tindakbalas logam) ...................................................................................................................... ..................................................................................................................... 2 Diagram 4 shows an experiment to find the relationship between lens thickness and its image distance. (Rajah 4 menunjukkan eksperimen untuk mengkaji hubung kait antara ketebalan kanta dengan jarak imejnya)Sharp image (Imej tajam)

Distant Object (objek jauh)

Lens K1 (Kanta K1)

White screen (Skrin putih)

DIAGRAM 4 3

An image of a distant object through lens KI is formed on a white screen. The screen is then adjusted so that a sharp image is formed. The experiment is repeated using lens K2 and K3 with different thickness. The image distance of each lens is recorded in Table 4. (Menggunakan satu objek jauh melalui K1, skrin dilaraskan supaya menghasilkan satu imej. Eksperimen itu diulang dengan menggunakan kanta K2 dan K3 yang mempunyai ketebalan berbeza. Jarak imej setiap kanta dicatatkan. Keputusan yang diperolehi seperti dalam Jadual 4.) Lens (Kanta) K1 K2 K3 Image distance ( cm ) (Jarak imej) ....................................... 1.2 0.5

TABLE 4 (a) State one characteristic of the image observed. (Tuliskan satu pemerhatian sifat imej) ................................................................................................................. .................................. [1 mark] (b) (c) Measure and state the image distance of lens K1 in Table 4. (Ukur dan catat jarak imej bagi kanta K1 dalam Jadual 4) [1 mark] Based on Table 4, which of the lenses is the thinnest? (Berdasarkan Jadual 4, kanta manakah paling nipis?) ................................................................................................................. [1 mark] (d) State the hypothesis for this experiment. (Nyatakan satu hipotesis dalam eksperimen itu) 4

................................................................................................................. .................................. [1 mark] (e) State the variables in this experiment. (Nyatakan pembolehubah dalam eksperimen ini ) Pembolehubah dimanipulas (MV):................................................................ Pembolehubah bergerakbalas (RV):............................................................. Pembolehubah dimalarkan (FV):.................................................................. [1 mark] 3. Diagram 3 shows an experiment to study the relationship between the mass of object and the inertia. Rajah 3 menunjukkan eksperimen untuk mengkaji perhubungan antara jisim objek dengan inersianya.

Swinging Berayun

Swinging Berayun

Weight / Beban 50 gm DIAGRAM 3 RAJAH The result are recorded in Table 3. 3

Weight 10 gm Beban 10 gm

Keputusan yang diperolehi dicatatkan dalam Jadual 3. Mass of weight Jisim beban(gm) 50 10TABLE 3 JADUAL 3

Time to stop swinging/minute Tempoh objek berayun sehingga berhenti / minit 9 5

(a)

State one observation from the above result. Nyatakan satu pemerhatian daripada keputusan di atas. 5

................................................................................................................. ....................................... [1 mark] (b) What is the inference that can be made from the observation? Apakah inferens yang boleh dibuat daripada pemerhatian itu? ................................................................................................................. ....................................... [1 mark] (c) State the variables in this experiment. Nyatakan pembolehubah dalam eksperimen itu. (i) Manipulated variable : Pembolehubah dimanipulasi:

......................... (ii) Constant variable : Pembolehubah dimalarkan : ...................... (iii) Responding variable : Pembolehubah bergerak balas : ...................... [2 marks] (d) What is the operational definition for inertia? Apakah definisi secara operasi bagi inersia? ................................................................................................................. ....................................... [1 mark] (e) State the hypothesis for this experiment. (Nyatakan satu hipotesis dalam eksperimen itu) ................................................................................................................. 6

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

7

4

Diagram 2(a) and 2(b) shows the experiment to study the relationship between object distance of lens P and the characteristic of image formed. Rajah 2(a) dan 2(b) menunjukkan eksperimen untuk mengkaji hubungan di antara jarak objek kanta P dengan sifat imej yang terhasil .Object Objek Lens Kanta P

2F

F

F

2F

Diagram 2(a) Rajah 2(a)Object Objek Lens P Kanta P

2F

F

F

2F

Diagram 2(b) Rajah 2(b) (a) Complete ray diagram on Diagram 2(a) and Diagram 2(b) to show image formed. Lengkapkan rajah sinar pada Rajah 2(a) dan Rajah 2(b) untuk menunjukkan imej yang terhasil. [2 marks] Measure and write image distance on Diagram 2(a) Ukur dan tulis jarak imej pada rajah 2(a) . ................................................................................................................. [1 mark] Write one hypothesis based on Diagram 2(a) and Diagram 2(b) Tuliskan satu hipotesis berdasarkan Rajah 2(a) dan Rajah 2(b). ................................................................................................................. ............................................ 8

(b)

(c)

[1 mark] (d) State the variables in this experiment. Nyatakan pembolehubah dalam eksperimen itu. (i) Manipulated variable : (Pembolehubah dimanipulasi: )

......................... (ii) Constant variable : ( Pembolehubah dimalarkan : ) ...................... (iii) Responding variable : (Pembolehubah bergerak balas : )

...................... [2 marks] 5 Diagram 4 shows the set-up of the apparatus to investigate the relationship between mass and inertia. (Rajah 4 menunjukkan susunan radas untuk mengkaji hubungan antara jisim dan inersia) Three cans A, B and C are pushed at the same time by the same force. The time taken by each tin to stop from its swinging is observed. (Tiga tin A, B dan C ditolak pada masa yang sama dengan daya yang sama. Masa yang diambil oleh setiap tin untuk berhenti berayun dicatat. )

Can with 200 g soil (Tin dengan (Tin dengan 200 g tanah ) ) 200 g tanah Can A (Tin A) Can B (Tin B) DIAGRAM 4 Can C (Tin C)

Can with 400 g soil (Tin dengan 400 g tanah) Can with 800 g soil (Tin dengan 800 g tanah)

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The results of the experiment are recorded in Table 4. (Keputusan eksperimen dicatat di dalam Jadual 4. ) Can (Tin) Time taken for can to stop (minutes) (Masa yang di ambil untuk tin berhenti (minit)) A B C

2

4

15

TABLE 4

(a)

Based on Table 4, state one observation in this experiment. (Berdasar Jadual 4, nyatakan satu pemerhatian bagi eksperimen ini)

.............................................................................................................. [1 mark] (b) State the variables in this experiment. Nyatakan pembolehubah dalam eksperimen itu. (i) Manipulated variable : Pembolehubah dimanipulasi:

......................... (ii) Constant variable : Pembolehubah dimalarkan : ...................... (iii) Responding variable : Pembolehubah bergerak balas :

(c)

...................... [2 marks] What is the operational definition for inertia? Apakah definisi secara operasi bagi inersia? .................................................................................................................

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

10

(d)

State one hypothesis of this experiment (Nyatakan satu hipotesis bagi eksperimen ini) ...................................................................................................... [1 mark] If can D with 600 g soil is used in this experiment, predict the time taken for the can to stop? (Jika tin D dengan 600 g tanah digunakan dalam eksperiment ini, ramalkan masa yang diambil untuk tin D berhenti ?)

(e)

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

6

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) 1 2 3 4 5 6 Temperature (oC) (Suhu (oC) 10 20 30 40 50 60TABLE 1 (JADUAL 1)

Number of bacterial colonies (Bilangan coloni bakteria) 2 5 9 10 ........................ 0

(a)

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

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

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(b) 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) ................... .......................... (c) [1 mark] 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 marks]

Number of bacterial colonies (Bilangan koloni bakteria) 1 2 1 0 8

6

4

2

0 00

10

20

30

40

50

60 Temperature (oC) (Suhu oC)

12

(c) 1

Based on the graph, state the number of bacterial colonies at 50 0 C in Table

(Berdasarkan graf, nyatakan bilangan koloni bakteria pada suhu 500 C dalam Jadual 1) ....................................................................................................................[1 mark] 7 Diagram 4 shows an experiment to study the relationship between the upthrust and the weight of an object. (Rajah 4 menunjukkan satu eksperimen untuk mengkaji hubungan antara daya tujah ke atas dengan berat objek)Spring balance

Eureka can Object (objek) Water (Air)

DIAGRAM 4.1 (RAJAH 4.1)

DIAGRAM 4.2 (RAJAH 4.2)

(a) (i)

State the weight of object in: (Nyatakan berat objek di dalam :) Weight of object in air (N) Berat objek di udara (N) Weight of object in water (N) Berat objek di dalam air (N) Loss of weight of object (N) Kehilangan berat objek (N)

(b)

State one inference that can be made from the observation. (Nyatakan satu inferens yang boleh dibuat berdasarkan pemerhatian) .........

.............................................................................................. 13

[1 mark] (c) State one way how to fix constant variable in this experiment. (Nyatakan satu cara untuk menetapkan pembolehubah yang dimalarkan dalam eksperimen di atas) ............................................................................................................. [1 mark] (d) An object immersed in water experience upthrust .State the operational definition for upthrust. (Objek yang terendam di dalam air mengalami daya tujah ke atas. Nyatakan definisi secara operasi bagi tujah ke atas). ................... ................... [1 mark]

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