Answers : Question Section B 2

3.

a)  To study the relationship between the size of the shadow of an object and       the distance between the object  and  the light source.       Untuk mengkaji hubungan antara saiz bayang-bayang objek dengan        jarak di antara objek dengan sumber  cahaya (b)  The distance between the object and the light source (Distance A)        Jarak di antara objek dan sumber cahaya (Jarak A)     (c)  10 cm (d)  The nearer the object is to the light source, the bigger the size of         the shadow formed will be.        Semakin dekat objek dengan sumber cahaya, semakin besar        saiz bayang-bayang yang akan terbentuk.

4.	(a)  The same as the shape of the ball        Sama seperti bentuk bola (b)  The size of the shadow        Saiz bayang-bayang (c)  The position of the screen        Kedudukan skrin (d)  Move the ball towards the torch        Gerakkan bola ke arah lampu suluh

Answers : Question Section B 1

1.

(a)  To study the relationship between the distance of the source of light from        the object and the size of the shadow (b)  The distance of the source of light from the object (c)  6 cm (d)  The size of the shadow depends on the distance of the source of light         from the object./The closer the source of  light is to the object,        the bigger the shadow will be.

2.

(a)  Group 1: Aluminium plate; Mirror; Silver plate        Kumpulan 1: Kepingan aluminium; Cermin; Kepingan perak        Group 2: Cardboard; Wooden block; Cloth        Kumpulan 2: Kadbod; Bongkah kayu; Kain (b)  Group 1: Good reflectors of light        Kumpulan 1: Pemantul cahaya yang baik        Group 2: Poor reflectors of light        Kumpulan 2: Pemantul cahaya yang lemah (c)  1. Smooth            Licin        2. Shiny            Berkilat

Question Section B: 2

3.

A group of pupils carried out an investigation to study the relationship between the size of the shadow of an object and the distance between the object and the light source. Sekumpulan murid menjalankan satu penyiasatan untuk mengkaji  hubungan antara saiz bayang-bayang suatu objek dan jarak antara  objek itu dengan sumber cahaya.   The table below shows the results of the investigation. Jadual di bawah menunjukkan keputusan penyiasatan ini.   (a)  What is the purpose of this investigation?        Apakah tujuan penyiasatan ini?        __________________________________________________              __________________________________________________                                                                            [1 mark/1 markah] (b)  In this investigation, what is changed (manipulated variable)?        Dalam penyiasatan ini, apakah yang diubah        (pemboleh ubah dimanipulasikan)?      _______________________________________________                                                                             [1 mark/1 markah] (c)  Predict the height of the shadow if distance A is 50 cm and        distance B is 15 cm.        Ramalkan ketinggian bayang-bayang jika jarak A adalah 50 cm       dan jarak B adalah 15 cm.        _______________________________________________        _______________________________________________                                                                              [1 mark/1 markah] (d)  What conclusion can be drawn from this investigation?        Apakah kesimpulan yang dapat dibuat daripada penyiasatan ini?       _____________________________________________        _____________________________________________                                                                             [1 mark/1 markah]

4.

A pupil carries out an investigation by using the apparatus shown in the diagram below. Seorang murid menjalankan satu penyiasatan menggunakan peralatan seperti yang ditunjukkan pada rajah di bawah. DIAGRAM / RAJAH (a)  What is the shape of the shadow seen on the screen?        Apakah bentuk bayang-bayang yang dilihat pada skrin?        _________________________________________________        _________________________________________________                                                                                  [1 mark/markah] (b)  What is observed (responding variable) in this investigation?        Apakah yang dapat diperhatikan (pemboleh ubah bergerak balas)        dalam penyiasatan ini?        __________________________________________________        __________________________________________________                                                                                   [1 mark/markah] (c) Besides the position of the ball, what is kept the same      (constant variable) in this investigation?       Selain daripada kedudukan bola, apakah yang ditetapkan       (pemboleh ubah dimalarkan) dalam penyiasatan ini?       __________________________________________________        __________________________________________________                                                                                  [1 mark/markah] (d)  What can be done to increase the size of the shadow without moving        the torch and the screen?        Apakah yang boleh dilakukan untuk membesarkan saiz       bayang-bayang tanpa menggerakkan lampu suluh dan skrin?        ____________________________________________________        ____________________________________________________                                                                                     [1mark/markah]