While there are some additional databases listed for each of your three assignments, most of you will be able to use the large, interdisciplinary databases such as Academic Search Complete and Proquest Central to locate articles in peer reviewed journals as well as from popular publications such as Time and the New Yorker.
It is usually a good idea to start out broadly, so using just one or two of your topic terms is a good way to begin. Once you have a set of results, you can begin narrowing down your results by entering one or more terms. Searching in a specific field such as "Subject" or "Title" will narrow or focus your results.
America History & Life Bibliographic database contains over 450,000 citations and abstracts for journal and magazine articles, book and media reviews, and dissertations
Science Direct Approximately 1200 full-text journals in the sciences and social sciences
Philospher's Index Comprehensive bibliography of scholarly research in philosophy contains more than 450,000 records drawn from over 680 journals, originating from more than 50 countries.