Tag: oceans : temperature, salinity and density

Questions Related to oceans : temperature, salinity and density

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.

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

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. Volcanic

  2. Erosional

  3. Depositional

  4. All of these

Show answer
Correct Option: D

The movements in the ocean water is/are ___________.

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. Tides

  2. Waves

  3. Ocean currents

  4. All of these

Show answer
Correct Option: D
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.

The oceans are important because _________________.

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. They are storehouse of water vapours

  2. Water is available for agriculture

  3. They moderate the climate of coastal regions

  4. None of these

Show answer
Correct Option: C
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.