Oceans lay claim to about 70 percent of the surface of the earth, and ocean life accounts for 94 percent of living things. Despite this, scientists have yet to explore most of the ocean, as its average depth surpasses 12,400 feet and is mostly cloaked in darkness.
In 2007, a piece of oceanic crust found in Greenland was dated by scientists to be around 3.8 billion years old. The age of the oldest oceanic rocks was previously determined to be approximately 200 million years old.
The youngest part of the ocean floor is always found around mid-ocean ridges or other magma vents. The ocean floor moves up from the new earth developed at the edges of the continental plates.
Oceans cover the majority of the Earth's surface, which is why the Earth appears blue from outer space. Oceans cover over 129 million square miles of Earth, which is about 65.7 percent of the Earth's surface. The deepest part of the oceans can reach a depth of over 6 miles, and the ocean contains 97
Plate tectonics and reversals of the Earth's magnetic field are responsible for the magnetic stripes found on the ocean floor. When magma flows out of a mid-ocean ridge, small, magnetic minerals in the magma align themselves to point in the direction of the Earth's current magnetic North. Over time,
Only about 30 percent of the Earth's surface is dry land, oceans make up the remaining 70 percent. Earth's oceans are home to hundreds of thousands of marine life forms, but because most of the ocean depths remain unexplored, hundreds of thousands or even millions of unclassified life forms may exis
As a system of interconnected bodies of salt water, oceans cover 70 percent of the earth's surface and hold 97 percent of the planet's water supply. The five major oceans of the world are the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, the Southern Ocean and the Arctic Ocean.
Octopuses, jellyfish, sharks, sea stars and sea turtles are a few of the numerous animal species that inhabit the oceans. Since most plants need sunlight to carry out photosynthesis, many underwater plants make their homes close to the shore. Phytoplankton is one of the most common plant types.
The temperature of the Atlantic Ocean at its surface level averages about 17 degrees Celsius, which is not quite warm enough for a comfortable swim. However, the ocean's temperature varies widely based on location, climate, depth and other factors.
The ocean ecosystem, also known as the pelagic zone, is the largest collective ecosystem on Earth. Open waters have the greatest volume and depth of any living zone on the planet. The basis of ocean life is plankton, which are microscopic plants that move along ocean currents. Small animals such as