The correct answers are: continents; oceans;
The easiest and simplest way to organize and separate the land masses on our planet is to divide the land into continents, and to divide the bodies of water into oceans.
There are seven continents, Asia, Europe, Africa, North America, South America, Antarctica, and Australia, but you should keep in mind that Asia and Europe are geologically one continent, but are considered as two because of political and cultural reasons.
There's officially four oceans, Pacific Ocean, Atlantic Ocean, Indian Ocean, Arctic Ocean, but in the recent decades some of the scientists have been pushing for a fifth ocean around the Antarctica, the Southern Ocean.