Strand 3 Exemplar test memorandum Learner’s Book pages 158–160


Question 1 1.1 B  1.2 A  1.3 A  1.4 C 


Question 2 2.1 E  2.2 D  2.3 F  2.4 A  2.5 C 


Question 3 3.1 1: CuCl2 solution,  2: Positive rod,  3: Negative rod 


3.2 Bubbles,  chlorine gas 


3.3 Reddish brown substance,  copper  3.4 Electrolysis,  electroplating 


Question 4


4.1 Hypothesis: If more resistors are connected in series in a circuit, the bulbs get dimmer as there is less current. Prediction: The more resistors,  the dimmer the bulb gets. 


4.2 Independent variable: number of resistors in series  Dependent variable: brightness of the bulbs 


4.3 Yes all variables are kept the same  except the number of resistors  or bulbs 


Question 5 5.1 Prism 


5.2 Refraction  (2) (2)


(3) [7]


(1) (1)


5.3 White light travels in waves.  When it enters the prism  it is split into the different colours which each have a slightly different wavelength.  (4) [6]


144


(1) (1) (1)


(1) [4]


(1) (1) (1) (1)


(1) [5]


(3) (2) (2)


(2) [9]


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