How many oceans are there on earth? four five six seven

There are five oceans on Earth. Each ocean leads into the next, creating one huge expanse of water, covering 71 percent of Earth's surface.

The smallest ocean is the Arctic Ocean, with an area of 5,880 sq. mi. (9,485 sq km).

The Pacific Ocean is by far the biggest ocean. It covers nearly one-third of Earth's surface!

answer; i thinking 4.5 million. in sydney australia;