Constructing queries

Our last lecture focused on how search engines study user habits and characteristics when designing their web searches.
Suppose you had to write a paper for your Biology class on possibilities for life existing on other planets. Working in pairs (once again, different from the previous two groups), your task is to identify four good sources to help you in the assignment.
Your assignment should include:
- A description of how you constructed/refined your successive queries.
- An analysis of why/how the search engine responded to your search terms, relevancy of the sites returned, a comparison of the efficiency of each query.
- The URLs of the sources.
- If you were the instructor of the class and had to give advice to your students on performing the search, without mentioning specific web sites, what would you tell them on how to build the query?
Assignments should be emailed to mailto:itgs.sass@gmail.com before Friday, March 27th.