A primary source is information or literature about original research provided or written by the original researcher. Examples of primary sources include...
In the primary article, the authors will write about research that they did and the conclusions they made. Some key areas in the article to look for are similar to those found in a lab report including...
Sometimes scholarly journals will include review articles, which summarize published research on a topic but do not contain new results from original research. Even though these sources are scholary, they are NOT primary articles.
Along with being a primary source, it is frequently important that you know if your source is scholarly and appropriate for academic research. Some traits of scholarly articles are...
The best place to look for primary, scientific articles are journal databases provided by the library. These database contain millions of articles, most of them primary articles from scholarly journals.
Many of these databases allow you to refine you search to only articles or peer-reviewed journals, however, you still need to look at the article to determine if it is scholarly and contains original research.
Secondary sources in the sciences are about the research and discoveries of other people, usually with the goal of providing an overview of the topic that allows readers to quickly become familar with topic.
Some examples of secondary sources are...