While Wikipedia can sometimes be a good starting point, it is not considered "scholarly." If you are you having trouble distinguishing between the peer-reviewed/scholarly journals from the trade publication or popular magazines, Below is a link to a document that will help explain the differences.
REVIEW VERSUS RESEARCH
It is also important to be able to distinguish between review articles and research articles. A review article’s primary purpose is not to present new research, but to summarize, analyze, discuss, and provide an overview of previously published work on a topic. A research article is designed to present new research, methods, and/or findings. Research articles often employ the IMRAD (Introduction, Methods, Research, and Discussion) format. Below are a few articles of interest on this topic.
There is a lot of content in this box, be sure to scroll down for additional tips/techniques.
If you need a better understanding of Boolean logic and searching, here are a few resources to help:
Check out these databases if you are looking for scholarly articles.
Below are some databases that will be more relevant/useful for the "sciences." Be sure to "scroll" down through the box to see additional choices.
Open access, full text journal articles in physical sciences, engineering, life sciences, health sciences, social sciences, and humanities.
Your one true source for authoritatively identifying a chemical substance and its related chemical structures, chemical names, regulatory information, and properties, including CAS Registry Numbers®, reaction schemes, step-by-step experimental procedures, detailed conditions, and product yields.