Section 5 Resources for teaching Natural Sciences Tests and exams Strand 1 Exemplar test memorandum Learner’s Book pages 61–62


Question 1 1.1 oxygen 


1.2 respiration  1.3 energy  1.4 glucose 


1.5 carbon dioxide 


Question 2 2 C,  2 


A,  3  B,  1 


Question 3


3.1 Habitat is a region in which living things exist,  an ecosystem is the interaction between a community and its habitat. 


3.2 Population is a single type of species,  a community is when more than one type of species co-exists. 


3.3 A biotic factor is a living part of an ecosystem,  an abiotic factor is a non-living part of an ecosystem. 


Question 4


4.1 The Pacific sea otters were hunted and their population decreased.  (1) 4.2 The sea otter populations decreased.  Sea otters are the predators of kelp- grazing sea urchins whose population now increased.  Sea urchins eat kelp and so the kelp forests collapsed  as the urchin population was so high.  (4)


139 (2) (2)


(2) [6]


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


(1) [5]


(2) (2)


(2) [6]


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62