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 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 is the major property of seawater?

  1. Rainfall

  2. Snowfall

  3. Temperature

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

Temperate is one of the major property of seawater. It always varies from region to region. The surface temperature of the sea water decreases from the equatorial area towards the poles.

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 seas where the supply of freshwater exceeds the rate of evaporation, salinity is _______.

  1. High

  2. Low

  3. Not effected

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

In seas where the supply of freshwater exceeds the rate of evaporation, salinity is low. Near the estuaries generally the salinity is low because ample amount of fresh water enters the sea or ocean.

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 factor among the following is true in respect of salinity?

  1. After evaporation amount of salt remains same

  2. After evaporation amount of salt increase

  3. After evaporation amount of salt decreases

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

Because of the sun's heat, evaporation happens at a faster rate. Evaporated water turns into water vapour and reduces in quantity. But amount of salt remains the same in the remaining water and therefore the salinity of the 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

Which of the following affects the salinity of seawater?

  1. Uneven distribution of temperature

  2. Uneven supply of freshwater

  3. Both A and B

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

The uneven distribution of temperature on earth, uneven supply of freshwater, etc. affects the salinity of seawater. If temperature is high, evaporation will be high and it will result in high salinity. Again if evaporation is high but supply of fresh water exceeds evaporation than salinity will be low. So in many ways the salinity of sea water is effected.

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

What is salinity?

  1. Concentration of dissolved salt in water

  2. Temperature of water

  3. Concentration of minerals in water

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

Salinity is the amount of salt dissolved in a body of water. Salinity is an important factor in determining many aspects of the natural waters and of biological process within it, and is a thermodynamic state variable that, along with temperature and pressure, governs physical characteristics like the density and heat capacity of the water.

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.