Databases are collections of articles and other sources of scholarly information. They can be searched by using keywords, or words that describe a topic. Databases often provide peer-reviewed or scholarly articles for your research.
Scholarly journals have articles written by researchers who are considered experts in a field. These journals are also known as "peer-reviewed," "refereed" or "academic" journals. Journal of the American Medical Association (JAMA) is a scholarly journal.
Popular magazines have articles written by writers or journalists. Time or Newsweek are examples of popular journals.
Electronic journals are found in databases. An electronic journal has all of the information you would find in a print bound journal.