[ 20 Marks ] Answer all questions. 1. Diagram 1 shows an investigation. Two young rabbits of the same weight are kept in two cages labelled X and Y. Diagram 1 a) What is the purpose of the investigation? ___________________________________________________________ ___________________________________________________________ (1 mark ) b) In this investigation : i) What to change : __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ ii) What to keep the same :____________________________________ ( 2 marks ) c) Write one observation from the investigation. ___________________________________________________________ ___________________________________________________________ ( 1 mark ) d) State one inference based on the observation stated in 1 ( c ).

___________________________________________________________ ___________________________________________________________

2. Syariman sets up a simple pendulum to find out how the number of swingsof the pendulum in one minute change when the length of the pendulumchanges.The results of investigation are shown in the following table.

a) What is the aim of the investigation? ___________________________________________________________ ___________________________________________________________ ( 1 mark ) b) Based on the investigation, state the following : i) What to change : __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ ii) What to measure : __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ __ _ _ ( 2 marks ) c) State the pattern number of swings. ___________________________________________________________ ( 1 mark ) d) Predict the number of swings when the length of thread is 25 cm. ___________________________________________________________

3. The diagram below shows the set up of an experiment carried out by a group of pupils to study the factors that caused the rusting of an iron nail. Diagram 2 a) What is the purpose of the investigation? ___________________________________________________________ ___________________________________________________________ ( 2 marks ) b) State your observation based on the experiment. ___________________________________________________________ ___________________________________________________________ ( 1 mark ) c) State one inference based on the observation stated in 3 ( b ). ___________________________________________________________ ___________________________________________________________ ( 1 mark ) d) What is the conclusion of the investigation? ___________________________________________________________ ___________________________________________________________ 19