Answer:
The Sirena Deep, which lies 124 miles (200 kilometers) to the east of Challenger Deep, is a bruising 35,462 feet deep (10,809 m). By comparison, Mount Everest stands at 29,026 feet (8,848 m) above sea level, meaning the deepest part of the Mariana Trench is 7,044 feet (2,147 m) deeper than Everest is tall.
A grid system make it easier to find A LOCATION on a map.
The grid references define locations on maps by using Cartesian coordinates. The grid lines used on maps define the coordinate system and they are usually numbered to provide unique references to features.
Answer:
Mid ocean ridge are where new crustal material is forced to the surface. The new crustal material is pushed apart forming two different plates moving in two different directions. An ocean trench is where old crustal material is pushed under another plate where it is melted and turned into magma.
Wind, density difference in water masses which is caused by temp and salinity variations, gravity and an event like an earthquake.
