Geography · Environmental Studies

Oceanography and Hydrology

1,673 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

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

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.

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

Which of the following statements are true regarding the importance of ocean?

  1. Ocean water are home to a great variety of marine life.

  2. Oceans are an enormous source of energy. Tides and waves can be harnessed to generate power.

  3. Oceans serves as means of transport.

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Oceans are vital for marine biodiversity, energy production (tidal/wave), and global trade, making all the listed points correct.

Multiple choice evs magic with mirrors dual nature of light nature and sources of light theories on light

While moving from deep water to shallow water.

  1. Frequency of the water waves decrease

  2. Frequency of the water waves increase

  3. Frequency of the water waves stays the same

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The frequency of a wave is determined by the source and remains constant when the wave passes from one medium to another, while speed and wavelength change.

Multiple choice geography rivers, coasts and glaciation landforms created by wind erosion wind and coast denudation river landform

Which is not an erosional feature of sea waves?

  1. Ox bow lake

  2. Beach

  3. Sea cave

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Runoff, streams, and rivers carry sediment to the oceans. The sediment in ocean water acts like sandpaper. Over time, they erode the shore. The bigger the waves are and the more sediment they carry the more erosion they cause and form from wave erosion.

Ox bow lake are formed by the erosional work of river.

Multiple choice geography rivers, coasts and glaciation landforms created by wind erosion wind and coast denudation river landform

Sea caves are formed due to the ___________ work of sea waves.

  1. erosional

  2. depositional

  3. both a and b

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sea caves are coastal landforms created by the erosional power of waves striking against cliffs. The hydraulic action and abrasion of waves carve out cavities in the rock face.

Multiple choice geography rivers, coasts and glaciation landforms created by wind erosion wind and coast denudation river landform

The portion of the land projecting into the sea is called _________.

  1. beach

  2. sea cliff

  3. sand bar

  4. headland
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A headland is an area of land that extends into a large body of water. It is often a cliff or other elevated landform overlooking a sea or ocean. It is formed when a softer rock in pushed or eroded inwards, the hard rocks sticks out in the sea. 

Multiple choice geography rivers, coasts and glaciation landforms created by wind erosion wind and coast denudation river landform

Sea cliff, sea caves, lagoons are the landforms created by the action of _______________.

  1. glacier

  2. wind

  3. sea waves

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

Sea forms create erosional and depositional landforms. Steep rocky coast rising almost vertically above sea water is called sea cliff which is very precipitous with overhanging crest. Sea canes are formed by the mechanical erosion of rocks by the action of sea. A lagoon is a shallow body of water separated from a larger body of water by barrier islands or reefs. They form in areas with small tidal range.

Multiple choice geography rivers, coasts and glaciation landforms created by wind erosion wind and coast denudation river landform

The brackish water lying in between the coast and the sand bars is called the ______________. 

  1. beach

  2. sea caves

  3. lagoons

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

Lagoons are shallow bodies of water separated from a larger body of water by barrier islands or reefs. In coastal geography, the water trapped between the coast and sand bars is referred to as a lagoon.

Multiple choice geography endogenetic movements endogenic process and creation of mountains major domains of the earth land and oceans study of continents - north america earth's movement and creation of landforms earthquake earthquakes

Water bodies that are smaller in size than ocean are called ________.

  1. Gulf

  2. Sea

  3. Bay

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

The words 'ocean' and 'sea' are often used to mean the same thing. However, a sea is a small area of an ocean, usually with land on several sides.