Monday 12 December 2011

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]