Part A: To most effectively find information in an electronic database, it’s important to develop a structured search strategy to help organize your thoughts and to facilitate a productive search. Topic sentence: What are the major theories for the extinction of dinosaurs? 1. Analyze the topic into key concepts and list three keywords here. 2. Combine the three keywords you listed in question 1 into one search statement that uses two Boolean operators and at least one wildcard for truncation. 3. Explain the difference between primary sources of information and secondary sources of information. Identify which would be more helpful to you if you were looking for information concerning the extinction of dinosaurs and explain why.