If the solid earth were made into a flat plain, the seawater would cover the entire earth to a depth of 2440 meters.
http://eesc.columbia.edu/courses/ees/climate/lectures/o_strat.html
it would have to be completely remelted deep in the earth then rise to or near the surface and resolidify.
Pacific ocean
Oceans contain the most water because they cover the majority of the earth's surface and are often very deep. I would say the pacific ocean holds the most water of any one specific place on the planet.
In deep ocean waters because, it is very dark deep in the ocean and they need some souce of light.
Theory of plate tectonics explains how forces deep within earth can cause ocean floors to spread and continents to move
the ocean is deep because that is the shape of the earth and although we are not sure how deep the ocean is we do know that there is life in the deep. the ocean has made itself deep but there is really no cause that is known.
a deep-ocean trench is a portion of the earth crust
The most common answer would be deep ocean currents.
a deep-ocean trench is a portion of the earth crust
Sure. The mountains are often tall enough to poke through the surface of the ocean where they are called islands. There are deep valleys under the ocean, too. Some are deep enough that you could put Mount Everest in the ocean into these valleys, and it would be completely covered in water.
Planet Earth - 2006 Ocean Deep 1-11 is rated/received certificates of: Australia:G
The deepest point on the Earth's surface is Challenger Deep, part of the Marianas Trench in the Pacific Ocean
Water can only be as deep as the container it is in. On earth the deepest it can be would be measured at the deepest point in the Ocean. That point is the Mariana Trench, which is almost 36,000 ft (6.8 miles) deep. However, this is not a limit of the water. Only a limit of the earth.
what other ocean floor feature is fromed by movement of earth's plates
The gravitation pull on the earth.
it would have to be completely remelted deep in the earth then rise to or near the surface and resolidify.
The deepest point in any ocean is the Mariana Trench (aka Challenger Deep) in the western Pacific Ocean at 11,033 metres deep.