Final answer:
A secondary source in history is a written or created source that comes after the fact. Examples include biographies, maps, and blog posts. Secondary sources are important for understanding historical events, providing context, and accessing scholarly research.
Step-by-step explanation:
A secondary source is one written or created after the fact. Examples of secondary sources in history include a twentieth-century biography of an Egyptian pharaoh, a map drawn in the 1960s to identify the battle sites of World War II, and a museum curator's blog post about the artistic achievements of the Ming dynasty. These sources are critical for forming an understanding of past events, providing context, and accessing scholarly research based on primary sources. Good historical research requires both primary and secondary sources.