Academic writing is the most formal type of writing.
Think term paper. It has set rules for just about everything. Some of the requirements for academic writing are:
• Font size
• Ink color
• Footnotes and endnotes
• Type and kind of sources
• Number of words or pages
Depending on where the academic article will appear, more rules can be applied.
Academic writing is nonfiction, but it can discuss a work of fiction. Academic writing can present an opinion, but it has to be supported with accepted and appropriate research. Academic writing can present information and findings; this research paper presented at a symposium.
Specific requirements vary widely. A high school term paper won’t have the same set of rigid rules that a master’s degree thesis will have. Yet both are academic writing. Writing requirements can also vary from school to school, including colleges, and symposium to symposium.