what is the deepest ocean?(on earth)?

The following is a list of the deepest parts of the Earth's oceans and seas.

(all figures are number of below sea level)

Mariana Trench (10,911 m) (35,797 ft) (6.78 mi)

Mindanao Deep (10,850 m) (35,597 ft) (6.74 mi)

Philippine Trench (10,540 m) (34,580 ft) (6.55 mi)

Kuril-Kamchatka Trench (10,500 m) (34,449 ft) (6.52 mi)

Kermadec Trench (10,047 m) (32,963 ft) (6.24 mi)

Tonga Trench (9,900 m) (32,480 ft) (6.15 mi)

Japan Trench (9,000 m) (29,527 ft) (5.59 mi)

Milwaukee Deep (8,605 m) (28,232 ft) (5.35 mi)

Yap Trench (8,527 m) (27,976 ft) (5.30 mi)

South Sandwich Trench (8,428 m) (27,651 ft) (5.24 mi)

Puerto Rico Trench (8,400 m) (27,559 ft) (5.22 mi)

Peru-Chile Trench (8,065 m) (26,456 ft) (5.01 mi)

Diamantina Trench (8,047 m) (26,401 ft) (5.00 mi)

Romanche Trench (7,760 m) (25,460 ft) (4.82 mi)

Java Trench (7,725 m) (25,344 ft) (4.80 mi)

Cayman Trench (7,686 m) (25,216 ft) (4.78 mi)

Sunda Trench (7,455 m) (24,460 ft) (4.63 mi)

Middle America Trench (6,669 m) (21,880 ft) (4.14 mi)

How Deep

Is the Ocean?

The deepest known point on Earth is at the bottom of the Mariana Trench, a depression in the floor of the western Pacific Ocean, just east of the Mariana Islands.

The Mariana Trench is 1,554 miles long and 44 miles wide. Near its southwestern extremity, 210 miles southwest of Guam, lies the deepest point on Earth. This point — referred to as the “Challenger Deep”— plunges to a depth of nearly 7 miles.

In 1960, the Trieste, a manned submersible owned by the U.S. Navy, descended to the bottom of the Mariana Trench. There, the pressure from the weight of the vast ocean above is tremendous. At more than 8 tons per square inch, it’s the equivalent of one person trying to hold 50 jumbo jets!

The deepest known point on Earth is at the bottom of the Mariana Trench, a depression in the floor of the western Pacific Ocean, just east of the Mariana Islands. This trench is 1,554 miles long and 44 miles wide. Near its southwestern extremity, 210 miles southwest of Guam, lies the deepest point on Earth. This point — referred to as the Challenger Deep — plunges to a depth of nearly 7 miles. In 1960, the Trieste, a manned submersible owned by the U.S. Navy, descended to the bottom of the Mariana Trench. There, the pressure from the weight of the vast ocean above is tremendous. At more than 8 tons per square inch, it’s the equivalent of an average-sized woman trying to hold 48 jumbo jets!

According to my World Almanac, the Pacific Ocean has the greatest

average depth -- 12,925 feet, or almost 2 1/2 miles. The Pacific also

has the largest known maximum depth, in the famous Mariana Trench; this

maximum depth is 35,840 feet, or a little over 6 3/4 miles. (That's

deep!)

Trying to remember exactly how deep it is, but the Marianas trench in the Pacific Ocean is supposed to be the deepest. I want to say it's over 30,000 feet deep because I remember hearing it was farther below sea level than Mount Everest is above sea level.

Don't know how deep exactly, but its definetly the Pacific Ocean & the Mariana trench!

There's a crack by Japan that is the deepest point on earth. You might want to google it.

pacific ocean-mariana trench

i think the Pacific Ocean.How deep it is, im not sure.

http://en.wikipedia.org/wiki/Mariana_trench