Select whether each example of scientific communication represents a primary source or a secondary source.

A scientist is interviewed on a television program about an important discovery he made in cancer research.




An article in the journal Nature presents the original research results of a recent experiment by a group of biochemists.


An article in a small, specialized journal presents the results of a graduate student’s experiment.




A book summarizes important recent research on marine mammals.




An issue of a popular science magazine reports on some recent findings in brain research.