To contrast something is to look for differences among two or more elements, but compare is to do the opposite, to look for similarities.
What is to compare & contrast?
An artifact, document, diary, manuscript, autobiography, recording, or any other source of information that was created at the time under study.
What is a primary source?
A document or recording that relates or discusses information originally presented elsewhere.
What is a secondary source?
What someone thinks will happen, a forecast, but not only about the weather. A statement about the future.
What is a prediction?
A thing that represents or stands for something else, especially a material object representing something abstract.
What is a symbol?