geography of oceans

Map showing the Indian Ocean, Oman Sea, and the Red Sea. Map: Epmistes, MediaWiki Commons.

What is the Difference Between a Sea and an Ocean?

Caitlin Dempsey

A look at the geographic definitions of oceans and seas.

The Atlantic Ocean in Acadia, Maine. Photo: NPS Photo/Kristi Rugg.

How Many Oceans are There in the World?

Caitlin Dempsey

The world is made up of: one global ocean, three major oceans, four historic oceans, and five world oceans.