When creating a database using an ERD, what do the entities and relationships become (in database terms)?

MIS student, here. Learning about ERDs (entity relationship diagrams). ERDs are supposedly used for the purpose of later constructing a database. My question is this: - What will an entity (and, likewise, an entity's attributes) become upon implementing the database? For instance, will entities turn into rows and attributes into columns? - In fact, now that I consider it, I'd like to know how one implements associative entities from ERD to database form as well. Is there a difference between what a regular entity and an associative entity represent in terms of database terminology?