Solutions-Class 8-Geography-Chapter-4-Structure of Ocean Floor-Maharashtra Board

(iv) Though land is continuous, its level is not the same everywhere like that of water.

(i) Continental shelf

(iii) Volcanic ash, lava, fine particles of soil

(a) Name the landforms shown in the figure :

1- Marine Deep

2- Submerged Mountain

3-Submarine Plateau

4- Marine Trench

5- Continental slope

6-Continental shelf

(b) Landforms is useful for deep sea research :

Submarine plateau and marine trench are the landforms useful for deep sea research.

(c) Continental shelf is appropriate to be used for the protection of marine borders and naval base building.

• The sea bottom contains a variety of minerals, rocks, and tiny soil particles, as well as the remains of marine plants and animals.
• The study of the ocean floor is useful for studying marine life, mineral riches, and the process of volcanic eruption.

• Because the continental shelf is the shallowest region of the ocean floor, sunlight easily penetrates there.
• As a result of this action, algae, plankton, and other organisms flourish on a massive scale on the continental shelf. Fish eat algae, plankton, and other organisms, hence fish can be found on a big scale in the continental shelf.
• As a result, the continental shelf is a fishing paradise.

• Submerged hills are hundreds of kilometres broad and thousands of km long hills found on the ocean floor.
• Some of the buried hills have peaks that rise above sea level.These peaks are the visible land features that are surrounded by sea on all sides. These summits are known as islands. As a result, some marine islands are truly sea mountain peaks.

• Continental slope lies beyond the continental shelf. The deep abyssal plain begins beyond the continental slope.
• Therefore, the continental slope is considered to be the boundary of continents.

Man's disposal of waste items in the oceans promotes sea water pollution, and this discarded waste material harms the lives of marine animal life and marine plants.

As a result, human garbage dumping in the oceans is damaging to the ecosystem.

Madagascar and Sri Lanka are related to island of the ocean floor.

Madagascar is located near the continent of Africa and Sri Lanka is located near the continent of Asia.

Andaman and Nicobar Islands in our country are examples of peaks of submerged mountains.