Breakdown of Jeg kjøper to smørbrød med ekstra ost siden jeg er sulten.
Questions & Answers about Jeg kjøper to smørbrød med ekstra ost siden jeg er sulten.
Both can introduce causal clauses, but:
• fordi is slightly more direct for expressing cause (“because”).
• siden often gives background information, closer to “since.”
In everyday speech, you can usually use them interchangeably, though some learners feel fordi is more “explicit.”