Keywords are the words that you use when searching for information, whether in a library database or searching in Google.
The keywords you use can have a profound impact on the results of your research. Using the right words will speed up the research process, while the wrong words can bring it to a halt.
Before you can begin searching for information, identify keywords related to your topic. Key terminology can be easily be found by scanning:
Your research questions
Articles found from background research
Bibliographies found at the end of books and articles
And yes, Wikipedia
Be sure to keep a piece of paper and a pen handy, so you can try searching for any new keywords you discover!
If you are still struggling:
Use a thesaurus to identify synonyms
Find pictures related to your topic, then describe them
Brainstorm keywords with a librarian, your instructor, or a friend