Match each of the key terms with the definition that best fits it.

___________ A simultaneous relationship among instances of three entity types.

Here are the key terms from the chapter. The page where each term is first explained is in parentheses after the term.

1. Associative entity

2. Attribute

3. Binary relationship

4. Candidate key

5. Cardinality

6. Conceptual data model

7. Degree

8. Design strategy

9. Entity

10. Entity instance

11. Entity-relationship diagram (E-R diagram)

12. Entity type

13. Identifier

14. Multivalued attribute

15. Relationship

16. Repeating group

17. Ternary relationship

18. Unary relationship (recursive relationship)