Hydrosphere MCQ Question and Answer | Geography MCQ Question

The ocean surface currents follow clockwise circulatory paths in the northern parts of the Pacific and Atlantic oceans due to the Corioli's force. The Coriolis effect shifts surface currents by angles of about 45°. In the Northern Hemisphere, ocean currents are deflected to the right, in a clockwise motion.

North Atlantic warm currents flow in this region the ports of Baltic sea opened for trade in winter. Extended Gulf stream current above 40N latitude in Atlantic is termed as North Atlantic Drift, a warm water current, flowing from tropics towards pole affecting climate of near by coastal regions. Hence, sea ports in West Europe between 50N - 60N Latitude remain open in winters also.

The reason behind broadening the river valley is soil erosion. As the river water comes in contact with soil and rocks on its banks, it weathers up the material & after sometime this weathered up material is eroded away by same river water. Hence river valley is broadened.

Indian Ocean has Monsoon drift factors is responsible for the change in the regular direction of the ocean currents in the Indian Ocean. The currents in the northern portion of the Indian Ocean change their direction from season to season in response to the seasonal rhythm of the monsoons.

isohaline is a line or surface drawn on a map or chart to indicate connecting points of equal salinity in the ocean.

The ideal conditions for coral growth are water temperature around 20°C, tropical waters (between 30°N and 30°S) and adequate oxygen.

The water currents are responsible to influence the climate of their nearby regions. Gulf Stream is warm water current, its extension North Atlantic Drift passes by European shore raising the temperature of the region.

The correct decreasing order of the share of different salts in sea water are Sodium chloride, magnesium chloride, magnesium sulphate, potassium sulphate.

European countries Portugal borders Atlanic Ocean. The European (North East) Atlantic borders the five Member States of the UK, Ireland, France, Spain and Portugal, covering a vast area and a diverse range of ecosystems. More broadly, these ecosystems are split into the Celtic Seas, Bay of Biscay and Iberian Coast.

Lena river is a major river of Russia. It is a 440 km long river which originates from Lake Baikal and flows into the Arctic Ocean.