The term sea is often used interchangeably with ocean in American English which is technically incorrect.
What is the real difference between a sea and an ocean?
A sea is a body of saline water partly or fully enclosed by land.
Oh interesting. Do you know what the biggest sea on Earth is?
I believe it is the Baltic Sea
Is the Baltic Sea connected to an ocean then? Which one?
It drains to the Atlantic Ocean
Where does all of its salty water come from?