Hydrosphere MCQ Question and Answer | Geography MCQ Question

Oxbow lake is not a landform which results due to rejuvenation of a river. River rejuvenation involves a renewed period of vertical erosion to achieve a new and lower base level. An oxbow is a crescent-shaped lake lying alongside a winding river.

A steep sided canyon is formed by the river Colorado in the State of Arizona in U.S.A. The Colorado River in the Grand Canyon faces a battery of threats, each with a critical decision point.

A ship met with an accident at 30ºC and 35ºN. The ship was sailing in the Mediterranean Sea. The latitude of Mediterranean Sea is 34.553127, and the longitude is 18.048012. Mediterranean Sea is located at Italy country in the Seas place category with the gps coordinates of 34° 33' 11.2572'' N and 18° 2' 52.8432'' E.

The rise & fall of sea water due to gravity is termed as tide. It is combined effect of gravitational forces of moon and sun. As moon is closer to Earth than Sun, its gravitational pull is more as compared to that of Sun.

When water freezes in the polar seas the salts remain in the subsurface water that does not freeze. Seawater of typical saltiness freezes at about -1.8 °C. The water in contact with the freezing ice is cold and contains some of the salt excluded from the ice, so it is more dense than the warmer water below, and it sinks, mixing with the deeper water. This mixture ends up on the bottom of the ocean.

Of the following the busiest oceanic trade route is North Atlantic route. It connects the South America to North America(Panama Canal), Africa to Europe and Europe to Asia (through Gibraltar Strait connecting Mediterranean Sea ). It is the trade route between the continents and is always full of cargo ships being carried around continent to page on continent.

Mariana Trench is located in the western Pacific Ocean, it 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.

The average salinity of the sea water is 35 parts per thousand. The average ocean salinity is 35 ppt and the average river water salinity is 0.5 ppt or less. This means that in every kilogram (1000 grams) of seawater, 35 grams are salt.

Orinoco, Amazon and Congo rivers falls into the Atlantic Ocean.

The Sargasso Sea is a huge patch of ocean that is completely surrounded by water on all sides. It’s located within the North Atlantic subtropical gyre and is surrounded by strong currents, which makes it the only sea in the world that doesn’t have a land boundary.