World Geographical Records

Ocean salinity is highest in sub-tropical regions (around 20°-30° latitude) due to high evaporation rates exceeding precipitation. The equatorial region has lower salinity due to high rainfall, polar regions have low salinity from ice melt, and tropical regions are too broad - the specific maximum is in sub-tropical zones.

The Dead Sea is the saltiest sea in the world with salinity around 34% (more than 9 times ocean salinity). The Red Sea is salty (~4%) but not the saltiest. Arabian Sea and Caribbean Sea have normal ocean salinity (~3.5%). The Dead Sea's extreme salinity comes from high evaporation in an endorheic basin.

The International Date Line approximately follows the 180° meridian and passes through the Bering Strait (between Alaska and Siberia). The Malacca Strait (between Malaysia and Sumatra) and Gibraltar Strait (between Europe and Africa) are nowhere near the Date Line. The Date Line was specifically placed in the sparsely populated Pacific Ocean region.

Kuroshio is a warm ocean current that flows in the western North Pacific Ocean, similar to the Gulf Stream in the Atlantic. The other options are all cold currents: Peruvian (Humboldt) flows up the west coast of South America, Labrador flows south along the coast of Newfoundland, and Canary flows along the northwest coast of Africa.

Correct Answer: Asia

The Mariana Trench in the western Pacific Ocean is the deepest oceanic trench, reaching approximately 11,034 meters (36,201 feet) at its deepest point (Challenger Deep). The Tonga Trench, Japan Trench, and Kermadec Trench are all deep but none exceed the Mariana Trench.

Finland is the world's largest glacial plateau.

Equator passes through Asia, Africa and South

This desert is sterile because it is blocked from moisture on both sides by the Andes Mountains and by the Chilean Range.

Fjords are long, narrow inlets with steep sides created by glacial erosion. Norway's coastline is world-famous for its numerous and spectacular fjords, carved by ancient glaciers. While Alaska also has fjords, Norway is the classic and most representative example. Spain and Peru do not have significant fjord formations.

The Aral Sea was a large inland lake situated between Kazakhstan to the north and Uzbekistan to the south. It was once the fourth-largest lake in the world but has dramatically shrunk due to Soviet-era irrigation projects diverting its feeder rivers. Turkmenistan and Tajikistan do not border the Aral Sea.

Nile is the longest river (length = 6653 km).

The Caspian Sea is the world's largest inland water body, classified as a lake despite its name. It covers approximately 371,000 square kilometers. The Red Sea, Arabian Sea, and Black Sea are seas connected to oceans, not lakes. The Caspian is bordered by five countries and has no outlet to the ocean.

Abyssal plains are extensive, flat regions of the ocean floor that lie between the continental margins (where the ocean depth increases rapidly) and the mid-ocean ridges (where new oceanic crust is formed). They are among the flattest and smoothest regions on Earth, covered by fine-grained sediments. The other options are not standard geomorphological terms for ocean floor features.

This is the correct answer as the passage says, "In most of these disappearances, it is the fact that no distress signal was ever received from the disappearing ships or planes that enhance the cloud of mystery that surrounds them."