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 the properties of sea water properties of sea water oceanic salinity and oceanic temperature oceans : temperature, salinity and density circulation of ocean water

Which of the following controls the density of sea water?

  1. Temperature

  2. Salinity

  3. Both A and B

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

Temperature and salinity are the two properties of sea water that control the density of the sea water. If temperature reduces, density of water increases.

Multiple choice geography the properties of sea water properties of sea water oceanic salinity and oceanic temperature oceans : temperature, salinity and density circulation of ocean water

In which of the following area salinity is high?

  1. Tropical zone.

  2. Mid-latitudinal zone

  3. Polar areas

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

In tropical zone, temperature is generally higher than the other parts and so the rate of evaporation is also higher, therefore, salinity is higher.

Multiple choice geography the properties of sea water properties of sea water oceanic salinity and oceanic temperature oceans : temperature, salinity and density circulation of ocean water

In which of the following condition salinity is high?

  1. In seas where the rate of evaporation is high than the supply of freshwater.

  2. In seas where the rate of evaporation is low than the supply of freshwater.

  3. In seas where the supply of freshwater exceeds the rate of evaporation

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

In seas where the rate of evaporation is high than the supply of freshwater, salinity is high. It happens because due to evaporation water turns into water vapour and reduces in quantity, but the amount of salt remains the same.

Multiple choice geography the properties of sea water properties of sea water oceanic salinity and oceanic temperature oceans : temperature, salinity and density circulation of ocean water

In which of the following area salinity is very low?

  1. Polar area

  2. Tropical zones

  3. Mid-latitudinal zones

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

In the polar areas, temperature is very low and hence evaporation is also very less in polar areas, so salinity is low.

Multiple choice geography the properties of sea water properties of sea water oceanic salinity and oceanic temperature oceans : temperature, salinity and density circulation of ocean water

Under which condition the salinity of seas is not effected?

  1. When the evaporation is high than the supply of freshwater.

  2. When the supply of freshwater exceeds the rate of evaporation

  3. When supply of freshwater and evaporation of water is low

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

Salinity is not affected much in seas where both the supply of freshwater and evaporation of water is low. Because in both the reasons salinity almost remains the same.

Multiple choice geography the properties of sea water properties of sea water oceanic salinity and oceanic temperature oceans : temperature, salinity and density circulation of ocean water

When an ocean current flows from the frigid zone to the torrid zone, it ______ the temperature of the coasts in the torrid zone.

  1. Reduces

  2. Increases

  3. Neither Increases nor decreases

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

Cold ocean currents moving from higher latitudes (frigid zones) toward the equator (torrid zones) bring cooler water, which lowers the air temperature of the coastal regions they pass.

Multiple choice geography the properties of sea water properties of sea water oceanic salinity and oceanic temperature oceans : temperature, salinity and density circulation of ocean water

The ocean bottom relief are made due to the __________ interactions.

  1. Volcanic

  2. Erosional

  3. Depositional

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

The relief of the ocean floor is shaped by a combination of tectonic (volcanic), erosional, and depositional processes. These forces work together to create features like ridges, trenches, and abyssal plains.

Multiple choice geography the properties of sea water properties of sea water oceanic salinity and oceanic temperature oceans : temperature, salinity and density circulation of ocean water

The movements in the ocean water is/are ___________.

  1. Tides

  2. Waves

  3. Ocean currents

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

Ocean water is constantly in motion: north-south, east-west, alongshore, and vertically. Seawater motions are the result of waves, tides, and currents. Ocean movements are the consequence of many separate factors: wind, tides, Coriolis effect, water density differences, and the shape of the ocean basins.

Multiple choice geography the properties of sea water properties of sea water oceanic salinity and oceanic temperature oceans : temperature, salinity and density circulation of ocean water

The oceans are important because _________________.

  1. They are storehouse of water vapours

  2. Water is available for agriculture

  3. They moderate the climate of coastal regions

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

The oceans absorb heat near the equator and then transport that solar energy to polar regions. The oceans also moderate the climate within a region. Along with coastal areas, summer temperatures are not as hot, and winter temperatures are not as cold, because water takes a long time to heat up or cool down.

Multiple choice zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

A long term global cycle which is linked by water and in
which sea floor rising play an important role is

  1. Water cycle

  2. Carbon cycle

  3. Phosphorus cycle

  4. Carbon and nitrogen cycle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The phosphorus cycle is a long-term sedimentary cycle. Geological processes, such as tectonic uplift, move phosphorus from the sea floor back to land surfaces over geological timescales.

Multiple choice evs mud and stones soil - formation and profile soil-nature soil profile

Source of maximum sulphur is

  1. Ocean

  2. Land

  3. Rocks

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

Sulphur is widely distributed as native deposits near volcanoes and hot springs, is a component of sulphide minerals. E.g., galena, pyrite, sphalerite, etc., and is also found in meteorites. Significant deposits exist in salt domes along the Gulf coast of the USA, and in large evaporite deposits in eastern Europe and western Asia, and are most likely the result of bacterial breakdown of sulphate minerals. The weathering of rocks will result in the production of major source of sulphur.

Multiple choice botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

Mid latitude lakes undergo mixing more than equatorial lakes, select the correct reason.

  1. The midlatitude lakes turn over twice a year

  2. Midlatitude lakes develop a thermocline
  3. Water is densest at $4$

  4. All of the above

  5. They don't - equatorial lakes have more mixing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Deep lakes at mid-latitudes have well-pronounced stratification which leads to the lakes experiencing wealthy internal waves dynamics. These lakes also possess seasonal water mixing during the spring and autumn transitional periods. This is due to the non-linear thermal expansion of water when its temperature reaches 4$^0$C and the density of water is maximum.  Further, with the increasing latitudes support the general cyclonic water circulation. Hence the large lakes along mid-latitudes show a large variety of these physical processes.

Multiple choice chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Evaporation of water will be faster:

  1. near the sea

  2. far away from the sea

  3. both at equal rates

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

Increase in humidity, reduces the rate of evaporation. The area near sea will be more humid as compared to the area far away from the sea. Hence, evaporation will be faster far away from the sea.