Question

Answer the following questions in about 30 words.
(iii) List out the deepest trenches of various oceans.

Answer 1

1. Mariana Trench

Located in the western Pacific Ocean, the Marina Trench is considered to be the deepest part of the Earth’s surface. In fact, it is the Challenger Deep in the Mariana Trench that is known as the deepest point.

2.tonga trench

Located in the south-west Pacific Ocean and at the Kermadec Tonga Subduction Zone’s northern end, the Tonga Trench lies around 10.882 km below sea level. The deepest point in the Tonga trench, known as the Horizon Deep.

3. Philippine Trench

The third deepest point in the world, the Galathea Depth in the Philippine trench is 10.54 km below sea level. Also known as Mindanao Trench, this submarine trench is located in the Philippine Sea, spreads in a length of 1,320km and 30km width in the east of Philippines.

4. Kuril- Kamchatka Trench

Another deepest part of ocean belonging to the Pacific Ocean, this trench lies at a considerable depth of 10.5 km below sea level. Lying close to Kuril Island and off the coast of Kamchatka, this trench is responsible for a number of oceans bed volcanic activities in the region.

5. Kermadec Trench

Another submarine trench lies on the floor of the South Pacific Ocean, the Kermadec Trench stretches around 1,000 km between the Louisville Seamount Chain and the Hikurangi Plateau.

6. Izu-Ogasawara Trench

Located in the western Pacific Ocean, the Izu-Ogasawara Trench has a maximum depth of 9.78km. Also known as Izu-Bonin Trench, this deep trench stretches from Japan to the northern section of Mariana Trench and it is also an extension of the Japan Trench.

7. Japan Trench

Another deep submarine trench located east of the Japanese islands, Japan trench (as shown in image above) is part of the Pacific Ring of Fire in the northern Pacific Ocean. With a maximum depth of 9 km, the Japan trench stretches from the Kuril Islands to the Bonin Islands and is also the extension of the Kuril-Kamchatka Trench and the Izu-Ogasawara Trench to the north and south respectively.