Spend time observing or thinking about events that involve matter and energy. Which events can you explain? Which events can’t you explain? Now answer the following questions. Part A Describe three events that you cannot explain. Part B Ask a testable question about each event you listed in part A. Part C Write a hypothesis for each testable question you listed in part B. Remember, a hypothesis can be proven right or wrong, so make your best guess. Part D Pretend you have a well-equipped lab with every testing device imaginable. What would you measure to test the hypotheses you listed in part C?