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 zoology adaptations to different ecosystems adaptations to aquatic habitat different ecosystem ecosystem

The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called.

  1. Pelagic zone

  2. Benthic zone

  3. Lentic zone

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

Littoral zone is the shallow coastal zone. Light is available upto bottom in this zone. Therefore, producers are found throughout from surface to bottom in this zone. Rooted vegetation occurs along shores. Consumers are also available throughout, i.e., from surface to the bottom in this zone.

Multiple choice zoology adaptations to different ecosystems adaptations to aquatic habitat different ecosystem ecosystem

Bottom dwellers, where no light occurs is found in

  1. Benthic zone

  2. Abyssal zone

  3. Pelagic zone

  4. Lotic zone

  5. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The abyssal zone is the abyssopelagic layer or pelagic zone, that contains the very deep benthic communities near the bottom of oceans. The benthic zone begins from shore to continental shelf. The deep sea floor is called as the abyssal plain.

Multiple choice movements of ocean and sea water oceans : temperature, salinity and density geography tides and ocean currents circulation of ocean water oceanic circulations study of water pollution threats to water resource pollution and environment

The deep sea sediments are deposited mostly by __________________.

  1. microscopic organisms

  2. rivers

  3. ocean currents

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

Deep sea sediments are largely composed of the remains of microscopic organisms (like foraminifera and diatoms) that settle on the ocean floor.

Multiple choice movements of ocean and sea water geography ocean circulation of ocean water oceans : temperature, salinity and density tsunami and floods oceanic circulations

Sea-waves are undulated movements of water on the surface of the sea due to ________________.

  1. rotation of earth

  2. difference in temperature

  3. friction of wind on the surface

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

Wind blowing over the surface of the ocean creates friction, which transfers energy to the water and generates waves.

Multiple choice geography ocean currents movements of ocean water movements of ocean and sea water oceanic circulations

The ocean water current which flow slowly is called ______.

  1. warm current

  2. cold current

  3. stream

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

The ocean water current which flow slowly is called Drift. They are affected by atmospheric circulation and the wind belts. When the wind blows over the sea's surface in one direction for a period of time, the stress force produced by friction between the air and the sea water cause the sea water to flow.

Multiple choice geography ocean currents movements of ocean water movements of ocean and sea water oceanic circulations

The ocean water current which flow speedily is called ______.

  1. warm current

  2. cold current

  3. stream

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

The ocean water current which flow speedily is called Stream. The Gulf Stream is typically 100 kilometers wide and 800 meters to 1,200 meters deep. The current velocity is fastest near the surface with the maximum speed typically about 2.5 meters per second.

Multiple choice geography ocean currents movements of ocean water movements of ocean and sea water oceanic circulations

Arrange the wave generation forces in order of decreasing wave period:
1. Tsunami
2. Wind waves
3. Tides.

  1. 1, 2, 3

  2. 3, 2, 1

  3. 3, 1, 2

  4. 1, 3, 2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Wave periods: Tides have the longest period (12-24 hours), followed by Tsunamis (minutes to hours), and Wind waves (seconds). Decreasing order: Tides, Tsunami, Wind waves (3, 1, 2).

Multiple choice geography ocean currents movements of ocean water movements of ocean and sea water oceanic circulations

Tsunamis generally take birth in ____________.

  1. The ocean deep

  2. The deep sea plain

  3. The continental shelf

  4. The continental slope
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The tsunami height on the continental shelf is lower for steeper slope in comparison to flatter slope. This shows that, as the continental slope becomes flatter, more energy is transmitted to the shelf and higher tsunami height is observed.

Multiple choice geography ocean tsunami and floods movements of ocean and sea water oceanic circulations circulation of ocean water

Which of the following statements about the ocean currents is not correct?

  1. Currents are rivers in the sea

  2. The water moves forward and the currents are felt at the depth as well

  3. They are caused by the unequal temperature of equatorial and polar regions

  4. Generally there is scanty rainfall over the coastal areas where the warm currents flow
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Warm currents generally increase humidity and rainfall in coastal areas, not decrease it. Cold currents are typically associated with dry conditions.

Multiple choice geography our changing earth glacier glaciers landforms created by glacial erosion

Long sinuous ridges found in former glacial sites in the direction of ice melted water streams are known as ________.

  1. Eskers

  2. Fjords

  3. Erratics

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

Long sinous ridges found in former glacial sites in the direction of ice melted water strems are known as Eskers.

An esker, eskar, eschar, or os, sometimes called an asar, osar, or serpent kame, is a long, winding ridge of stratified sand and gravel, examples of which occur in glaciated and formerly glaciated regions of Europe and North America.

Multiple choice geography our changing earth glacier glaciers landforms created by glacial erosion

Drowned glaciated valleys in high latitude regions are known as _______.

  1. Fjords

  2. Ocean ridges

  3. Sub-marine canyons

  4. Glaciated vaIleys
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Drowned glaciated valleys in high latitude regions are known as Fjords.
Fjords are found in locations where current or past glaciation extended below current sea level. A fjord is formed when a glacier retreats, after carving its typical U-shaped valley, and the sea fills the resulting valley floor.

Multiple choice geography pressure belts and winds weather maps winds disaster risk reduction

Why don't the rivers falling into the Arabian Sea form deltas?

  1. The sea-coast is hard and rocky soil

  2. These rivers have a short swift course and flow down steep slopes

  3. They do not have enough of water

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

Rivers flowing into the Arabian Sea, such as the Narmada and Tapti, originate in mountainous regions and flow through narrow, steep paths. This high velocity prevents the deposition of sediments required to form deltas.