Author: Anonymous

5.7 Which of the four metal rods that Ty tested (aluminium, copper, iron and stainless steel) would the candle stay on the longest? Explain your answer. (2)

QUESTION 6   There are two types of mechanical energy: kinetic energy and gravitational potential energy.   Equations to use: Ekinetic = ½ mv2 Egrav = mgh   Remember that g = 10 m/s2  

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

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)

QUESTION 7   Pictured shows the Mach-5, the racing car of cartoon racing legend “Speed Racer”. This high-performance racing car has a number of unique features that give its driver an edge over the competition! The mach-5’s engine can exert a force of 6000 N on the car while the brakes can apply a force of 1000 N.       Right click on the button to open the diagram of the circuit in a new window.  

  SECTION A   Short questions.

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

  Ty finds this bar chart, which compares the heat conductivity of some metals.           Right click on the button to open the bar chart (graph) in a new window.             Use this bar chart to answer the following questions.  

1.2 Look at the following image and give a definition for the following term, Indigenous Art. (2)   Right click and open the image in a new tab.           

5.3 He repeats the investigation using copper, iron and stainless-steel rods, so that he can compare the conductivity of the four metals. State two things that Ty must do to make his investigation a fair test. (2)