Tag: circulation of ocean water

Questions Related to circulation of ocean water

Which of the following affects the salinity of seawater?

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

  1. Uneven distribution of temperature

  2. Uneven supply of freshwater

  3. Both A and B

  4. None of these

Show answer
Correct Option: C
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.

What is salinity?

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

  1. Concentration of dissolved salt in water

  2. Temperature of water

  3. Concentration of minerals in water

  4. All of above

Show answer
Correct Option: A
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.

Which of the following controls the density of sea water?

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

  1. Temperature

  2. Salinity

  3. Both A and B

  4. None of these

Show answer
Correct Option: C
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.

In which of the following area salinity is high?

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

  1. Tropical zone.

  2. Mid-latitudinal zone

  3. Polar areas

  4. All of above

Show answer
Correct Option: A
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.

In which of the following condition salinity is high?

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

  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

Show answer
Correct Option: A
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.

In which of the following area salinity is very low?

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

  1. Polar area

  2. Tropical zones

  3. Mid-latitudinal zones

  4. Temperate regions

Show answer
Correct Option: A
Explanation:

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

Under which condition the salinity of seas is not effected?

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

  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

Show answer
Correct Option: C
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.

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

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

  1. Reduces

  2. Increases

  3. Neither Increases nor decreases

  4. None of these

Show answer
Correct Option: A

State whether these sentences are true (T) or false (F).
The level of seawater remains the same everywhere.

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

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

False,

 Seawater level varies depending on the varying gravitational signature. For example, a seamount (a large mountain within the sea) pulls a large volume of water towards itself, resulting in an elevated surface near the mount. Due to the varying geographical structure of the planet, the sealevel varies with latitude and longitude.

The heavier silicates named 'Sima' or silica + magnesium are most aboundant in the __________.

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

  1. Crust

  2. Core

  3. Mantle

  4. Ocean floors

Show answer
Correct Option: D
Explanation:

The heavier silicates named 'Sima' or silica + magnesium are most aboundant in the ocean floor.

These are a mix of minerals like gold, silver, copper, lead, zinc, and rare earth metals like molybdenum, tellurium, and titanium that form along the ocean floor—near underwater volcanic vents. Finally, there are cobalt-rich ferromanganese (Fe-Mn) crusts that form a layer of the ocean floor.