A ______________________________ is a force of attraction that forms when atoms share or transfer valence electrons.

1.2 Electric cells generate electricity through which process? 1

5.3 Friction is dependent on what 2 factors 2

6.3 Study the following diagram and answer the questions that follow: If the diagram is not displaying, right-click on the blue button and “open in a new tab”   6.3.1 What percentage of the electrical energy is useful energy? 1

2.1 Electrostatic forces strength is determined by the distance between objects and the type of material. 1

SECTION B Define the following:

7.4 Study the diagram and answer the questions that follow     If the diagram is not displaying, right-click on the blue button and “open in a new tab”   7.4.1 What are the two forces working in on the bridge due to the force applied? 2   [1][2]  

6.2 Name and explain two (2) useful applications of resistors in our everyday lives. 4

Question 3   Choose the term on the right that best fits the statement on the left. 5

5.5 What proof do we have, on Earth, that the moon has a gravitational effect on our planet? 1