A journal contains articles on a specific subject.
Some examples are:
The Journal of Veterinary Medicine
Sports Psychiatry : Journal of Sports and Exercise Psychiatry
Film Quarterly
A database is an online tool that contains collections of many journals.
Some examples are:
Academic Search Complete
Opposing Viewpoints in Context
JSTOR
A peer reviewed article is critically examined and evaluated by other experts in the same field before being published. It's a way to vet research through a rigorous review process by qualified experts in the field.
Key points about peer-reviewed articles:
High level of credibility:
Due to the rigorous review process, peer-reviewed articles are considered highly reliable sources of information for academic research.
Expert review:
Articles are reviewed by other scholars with expertise in the subject matter, assessing the research methods, significance of findings, and overall quality.
Published in scholarly journals:
These articles are typically found in academic journals that follow a strict peer-review process.