3.5 Ice  3.6 Steam  3.7 Solid,  liquid,  gas 


Question 4 4.1 Electrolysis  4.2 ZnCl2 


4.3 Zn,  Cl2  4.4.1 Zn,  Cl2 4.4.2 ZnCl2 


4.4.3 Cl2 or ZnCl2  4.4.4 Cl2 


Question 5 5.1.1 Air pump 


5.1.2 Pressure gauge 


5.2 Pressure in a gas is caused by the gas particles bumping/colliding  into each other and the walls of the container. 


5.4.1 The particles are far apart. 


(1) (1)


(3) [9]


(1) (1) (2) (1) (1) (1)


(1) [8]


(1) (1)


(2)


5.4.2 The particles are moving very fast.  5.4.3 The forces between the particles are weak. 


5.3 Increased because the number of air particles inside the tyre has increased which increases the number of collisions between the air particles.  (2) (1) (1)


(1) [9]


Total: 35 marks Exemplar mid-year exam memorandum Learner’s Book pages 100–102


Question 1 1.1 C 


1.2 E  1.3 D  1.4 B  1.5 A 


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


(1) [5]


141


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