Around 70 percent of the Earth’s surface is covered by ocean.
The Pacific Ocean is the largest of the word’s oceans. The Pacific Ocean covers around 30 percent of the Earth’s surface.
The Pacific Ocean is surrounded by the Ring of Fire, a ring of volcanoes.
The Atlantic Ocean is the second-largest of the world’s oceans, covering around 21 percent of the Earth’s surface.
Oceans contain about 320 million cubic miles (1.35 billion cubic kilometers) of water.
The Earth’s oceans contain about 97 percent of the Earth’s water.
Humans have documented more of Space than they have of the ocean’s floor.
Mauna Kea, the tallest mountain in the ocean, stands 33,400 feet high.
Ocean and seawater are salty because they contain ions and minerals washed away from rocks on land.
Humans set foot on the Moon before they touched the bottom of the Mid-Oceanic Mountain Ridge.
Fifty percent of the land jurisdiction of the United States is underwater.
Humans have explored less than five percent of the world’s oceans.Sources