Question 1

Which of the following seas is unique because it has no land boundaries?

Accepted Answer

Sargasso Sea. The Sargasso Sea is the only sea located entirely within the Atlantic Ocean with no land boundaries. It is defined by ocean currents like the Gulf Stream and North Atlantic Drift. It is known for its distinctive brown sargassum seaweed.

Question 2

Lines on a map connecting points of equal salinity in the ocean are known as?

Accepted Answer

Isohalines. Isohalines are lines connecting points of equal salinity in the oceans. Salinity refers to the amount of dissolved salts in water. These lines help in understanding the distribution of salt content across different marine regions.

Question 3

Which of the following is a warm ocean current found in the Indian Ocean?

Accepted Answer

Agulhas Current. The Agulhas Current is a warm current that flows down the east coast of Africa in the Indian Ocean. The other options are cold currents located in the Atlantic Ocean. It plays a significant role in the climate of Southern Africa.

Question 4

Which part of the ocean floor is the shallowest and closest to the continent?

Accepted Answer

Continental Shelf. The Continental Shelf is the shallowest part of the ocean floor extending from the coast. It gently slopes towards the ocean basin and is rich in resources like oil and fish. Its average depth is about 200 meters.

Question 5

The Mid-Atlantic Ridge roughly follows the shape of which English letter?

Accepted Answer

S. The Mid-Atlantic Ridge roughly follows the 'S' shape of the Atlantic Ocean. It is a divergent tectonic plate boundary located along the floor of the Atlantic Ocean. New ocean floor is formed here due to volcanic activity.

Oceans & Currents — Set 1