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 landforms of the earth and internal forces general physical geography general knowledge

Identify the incorrect statement(s) about marine deposits.
1. Blue mud covers the largest area of ocean.
2. Green mud is found in abundance on the sea floor near the Cape of Good Hope.
3. Grey colour of Green Mud is because of mineral Glauconite.
4. Red Clay is the most widespread Pelagic deposit.

  1. 1 and 2

  2. Only 2

  3. Only 3

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

All statements provided are factually correct: Blue mud is the most common terrigenous deposit, Green mud is found near the Cape of Good Hope, the color is due to Glauconite, and Red Clay is the most widespread pelagic deposit. Since the question asks to identify incorrect statements and all are correct, 'None of these' is the right choice.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

Which one of the following is a correct sequence in the increasing order of salinity concentration?

  1. Gulf of California-Baltic Sea-Red Sea-North Sea

  2. Baltic Sea-North Sea-Gulf of California-Red Sea

  3. Red Sea-Gulf of California-North Sea- Baltic Sea

  4. North Sea-Gulf of California-Baltic Sea- Red Sea
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The salinity order is Baltic Sea (lowest, ~7-8 ppt) < North Sea (~35 ppt) < Gulf of California (~35-37 ppt) < Red Sea (highest, ~40 ppt).

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

Which one of the following type of tides is observed at an interval of every 6 months?

  1. Spring tides

  2. Neap tides

  3. Tropical tides

  4. Equinoctial spring tides
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Equinoctial spring tides occur twice a year, during the equinoxes (March and September), when the sun is directly over the equator, maximizing the gravitational pull on the Earth's oceans.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

What are Rogue waves?

  1. Waves that do not move horizontally but remain stationary

  2. Wave of unusually large size for the prevailing wind condition

  3. Waves produced due to the combination of low air pressure and onshore winds

  4. Waves produced due to the combination of high air pressure and offshore winds
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rogue waves are unusually large, spontaneous surface waves that occur in the open ocean and are a significant threat even to large ships, often appearing out of nowhere.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

Which one among the following is not correct regarding Tsunami?

  1. Tsunamis have a very long wavelength

  2. Tsunamis have a slight swell of about twelve inches above the normal sea surface

  3. Tsunamis grow in height when they reach shallower water

  4. Tides also play an important role in the generation of Tsunamis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tsunamis are generated by seismic activity (earthquakes), volcanic eruptions, or underwater landslides, not by tidal forces.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

Consider the following statements:
1. Ocean currents are the slow surface movement of water in the same.
2. Ocean currents, assist in maintaining the Earth's heat balance.
3. Ocean currents are set in motion primarily by prevailing winds.
4. Ocean currents are affected by the configuration of the ocean.
Which of the statements given above are correct?

  1. 1 and 2

  2. 2, 3 and 4

  3. 1,3 and 4

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

Statement 1 is incorrect because ocean currents are not just slow surface movements; they can be deep and fast. Statements 2, 3, and 4 are correct regarding heat balance, wind influence, and coastal configuration.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

The ocean relief is generally ____________.

  1. more diverse than that of the continents

  2. more uniform than that of the continents

  3. showing minor variations only

  4. not much of a significance
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The ocean floor contains vast mountain ranges, deep trenches, and expansive plains that are far more varied and rugged than the topography found on land.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

Regarding Halocline, choose correct facts given below.
1. It relates to salinity change only.
2. Pycnoclines, in normally follows halocline.
3. It is a subtype of chemocline.

  1. Only 1

  2. 2 and 3

  3. 1 and 3

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

A halocline is a vertical zone in the ocean where salinity changes rapidly. It is a type of chemocline, and pycnoclines (density changes) are often driven by haloclines.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

Thermohaline is a part of large scale ocean circulation around the earth. Choose correct statements:
1. It is driven by density gradient.
2. It includes both the processes of sinking and upwelling of waters.
3. State of circulation has large impact on climate of Earth.
4. It is sometimes called ocean conveyor belt or meridional overturning circulation.

  1. 1 and 4

  2. 1 and 3

  3. 1, 2 and 3

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

Thermohaline circulation is driven by density differences (temperature and salinity), involves deep-water formation and upwelling, and is crucial for global heat distribution.

Multiple choice evs interdependence in our environment meaning of environment significance of biodiversity habitat and adaptation

Which of the following is a salt rich habitat?

  1. Saline soils

  2. Tidal marshes and mangroves

  3. Coastal dunes and saline soils

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

A salt-rich habitat is the type of habitat which has plenty of minerals and salts in it. Salt marshes are coastal wetlands that are flooded and drained by salt water brought in by the tides. Saline soils are the ones that have the input of salt water in it. Coastal dunes are immediate landward of the beach are commonly found large, linear accumulations of sand known as dunes. 

Therefore all of the above are rich in salts and are salt-rich habitats. 
So the correct answer is ' All of the above'. 

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Temperature variation in Pacific ocean in present time is called as

  1. Cyclone effect

  2. El Nino effect

  3. Green house effect

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

Every few years unusually warm currents occur in the South Pacific Ocean of South America. This rise in temperature is due to a relaxation of the trade winds, that move the ocean waters throughout the globe. Without the trade winds, the surface waters rate of evaporation declines and heat loss slows. With the cooling of the South Pacific disrupted, unusually high temperatures occur along the coastal shores of Chile all the way up to Ecuador. El Nino is periodic increase in temperature, which fluctuates from a small increase in temperature.