Ocean relief

Q. Which is the deepest trench in the world?

1. Philippine Trench
2. Tonga Trench
3. Kuril–Kamchatka Trench
4. Mariana Trench

Q. What are abyssal plains?

1. Marine islands having flat summit are called abyssal plains.
2. Abyssal plains are flat beds found in rivers.
3. Abyssal plains are the flat surfaces seen after the continental slope.
4. None of the above

Q. What is the average depth of the ocean?

1. 3700 meters
2. 3000 meters
3. 7300 meters
4. 7000 meters

Q. Which of these statements signify the importance of the continental shelves?

1. This zone is suitable for agriculture.
2. This zone is rich in mineral deposits.
3. Fossil fuels like petroleum and natural gas are abundant in the continental shelves.
4. Fishing is also practised extensively in continental shelves.