State the aim of the above diagram. Write the major materials needed for the above experiment. Write the observation during the above experiment. What is the conclusion of the experimental set up above.

Here are the answers to your questions: Step 1: Answer to i) The aim of the experiment is to demonstrate the thermal expansion of metals. Step 2: Answer to ii) The major materials needed for the experiment are: • A retort stand • A metal ball • A metal ring (with a handle) • A Bunsen burner Step 3: Answer to iii) The observation during the experiment is that initially, the metal ball passes through the ring. After heating the metal ball with the Bunsen burner, the metal ball will no longer pass through the metal ring. Step 4: Answer to iv) The conclusion of the experimental setup is that metals expand when heated and contract when cooled.