Geography · Environmental Studies

Oceanography and Hydrology

1,743 Questions

Find relevant questions on oceanography and hydrology that address aquatic ecosystems and physical geography. The topics include coastal landforms, coral reefs, ocean salinity, and tidal patterns. These concepts frequently appear in civil services and state level administrative examinations.

Coral reef structuresCoastal landformsOcean salinity patternsGlacial retreat impactsMangrove ecosystems

Oceanography and Hydrology Questions

Multiple choice geography structure of ocean floor relief of the ocean ocean water movement ocean circulation

The process by which water continually changes its form and circulates between oceans, atmosphere and land.

  1. Water cycle

  2. Tides

  3. Ocean currents.

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The process by which water continually changes its form and circulates between oceans, atmosphere and the land is called the water cycle.

The water cycle, also called the hydrological cycle, involves the continuous circulation of water in the Earth-atmosphere system. Of the many processes involved in the water cycle, the most important are evaporation, transpiration, condensation, precipitation, and runoff.

Multiple choice geography structure of ocean floor relief of the ocean ocean water movement ocean circulation

Generally the warm ocean currents originate near __________.

  1. Poles

  2. Equator

  3. None of these

  4. Both A and B
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The warm ocean currents originate near the equator and move towards the poles. The cold currents carry water from polar or higher latitudes to tropical or lower latitudes.
Warm ocean currents flow away from the equatorial region on the western side of ocean basins. The Gulf Stream in the North Atlantic and the Kuroshio Current in the North Pacific are examples of warm currents.

Multiple choice geography structure of ocean floor relief of the ocean ocean water movement ocean circulation

Correct the false statements.

  1. Oceans trenches can be located near the continents

  2. Relief features of the oceans are like plains

  3. Most salt in the seas are washed into it from the land over centruries

  4. Temperature of ocean water remains the same across the globe
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ocean trenches are deep depressions in the ocean floor that are often found near continental margins or island arcs, making statement A correct. The other statements are factually incorrect regarding ocean relief or salinity processes.

Multiple choice geography structure of ocean floor relief of the ocean ocean water movement ocean circulation

Continental shelf of the ocean occupies about _____ of the ocean area.

  1. 6.7%

  2. 7.6%

  3. 8.6%

  4. 9.6%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The submerged margins of continental mass extending from the shore to the first prominent break are sloped usually at a depth of about 120 m. Continental shelf occupies about 7.6% of the ocean floor. The width of the continental shelf varies considerably. The largest shelf the Siberian Shelf in the Arctic Ocean stretches to 1,500 kilometers in width.

Multiple choice geography structure of ocean floor relief of the ocean ocean water movement ocean circulation

Since 70.78 percent of the earth's surface is covered by water it is called ___________.

  1. blue planet

  2. red planet

  3. green planet

  4. living planet
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Earth is referred to as "the blue planet" because of the abundance of water on the planet. Over 70 percent of the Earth's surface is comprised of water, producing a vivid blue color when viewed from space

Multiple choice geography structure of ocean floor relief of the ocean ocean water movement ocean circulation

A narrow strip of water body joining two large water bodies is called ___________.

  1. gulf

  2. bay

  3. strait

  4. isthmus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A strait is a narrow waterway that connects two larger bodies of water. It can develop after water breaches an isthmus, which is a narrow strip of land connecting two bodies of water. A strait can also be caused by water overflowing onto eroded land.

Multiple choice geography structure of ocean floor relief of the ocean ocean water movement ocean circulation

Which are called the flattest and smoothest regions of the oceans?

  1. Continental shelf

  2. Continental slope

  3. Deep sea plain/Abyssal Plain

  4. Oceanic deeps or trenches
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3,000 metres and 6,000 metres. Lying between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth’s surface. They are among the flattest, smoothest and least explored regions on Earth. 

Multiple choice geography structure of ocean floor relief of the ocean ocean water movement ocean circulation

The sub-marine canyons are found in ________.

  1. Continental shelf

  2. Continental slope

  3. Ocean deep

  4. Ocean plain
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Submarine canyons originate either within continental slopes or on a continental shelf. They are rare on continental margins that have extremely steep continental slopes or escarpments. Submarine canyons are so called because they resemble canyons made by rivers on land.

Multiple choice geography structure of ocean floor relief of the ocean ocean water movement ocean circulation

Sunlight can penetrate into the ocean only up to a depth of ________.

  1. 150 meters

  2. 200 meters

  3. 100 meters

  4. 2000 meters
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sunlight entering the water may travel about 1,000 meters into the ocean under the right conditions, but there is rarely any significant light beyond 200 meters.

The ocean is divided into three zones based on depth and light level. The upper 200 meters of the ocean is called the euphotic, or sunlight zone. This zone contains the vast majority of commercial fisheries and is home to many protected marine mammals and sea turtles.