4.8 Looking at the information in the text, do you think it is important that an effective malaria vaccine is developed as soon as possible? Give a reason for your answer. (2)

6.2 A 50 g ball is dropped on to a hard surface and it bounces. It hits the hard surface at a speed of 12 m.s-1. Calculate the kinetic energy of the ball just before it hits the hard surface. (3)

4.6 How would the government know how many people are infected with malaria? (1)

4.3 Describe how the malaria parasite is passed from one human to another. (2)

1.8 These diagrams represent the gases helium and hydrogen.   Right click on the button to open the diagram in a new window.       Which of these statements correctly describes the diagrams? (1)

2.3 Group 1 metals are very reactive when placed in water. Name the TWO products that form when potassium reacts with water. (2)

  TOTAL QUESTION 3:   TOTAL SECTION A:

1.5 Read the following statements about micro-organisms.   1. Some micro-organisms cause disease. 2. Antibiotics are effective against all micro-organisms. 3. All bacteria are classified as micro-organisms. 4. Some fungi are classified as micro-organisms.     Which of these statements are correct? (1)

4.5 How do you think will an increase in the number of malaria infections would affect the South African economy? (2)

QUESTION 5   Ty is investigating the heat conductivity of four different metals. He places a wax candle on an aluminium rod.       Right click on the button to open the experimental set up in a new window.   Ty heats the end of the aluminium rod. The wax candle falls off the bar when the heat reaches it. He records the time it takes for the wax candle to fall off.