Across
- 2. Main subject of a talk, book etc.
- 4. Basic idea or rule that explains how something happens or works
- 6. A thing being discussed, considered or studied
Down
- 1. Main characteristic of something
- 2. Used to refer to what one is studying or writing about
- 3. A representation of something as a simple description and might be used in calculations
- 5. Subject or problem which people are talking about
- 7. Statement of the rules on which a subject of study is based/an opinion or explanation