Tag: oceans : temperature, salinity and density

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Questions Related to oceans : temperature, salinity and density

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

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

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

  1. Crust

  2. Core

  3. Mantle

  4. Ocean floors
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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.