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प्रश्न
Explain how temperature affects the following.
The salinity of sea water
उत्तर
Salinity Affects Density. When salt is dissolved in fresh water, the density of the water increases because the mass of the water increases. The more salt there is dissolved in the water, the greater its salinity. Temp causes water to rise or sink through convection, and salinity affects the density of the water, so higher salinity water will contribute to deep water currents Density is affected by temperature and salinity. Cold water or water with dissolved salts (higher salinity) is denser than warm water or water without dissolved salts (low or no salinity).
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संबंधित प्रश्न
Tick the correct box according to the salinity of the ocean water ✓.
- Slanting sunrays, melting snow.
- Cloudy sky, rainfall throughout the year.
- Clear skies for the most part, perpendicular sunrays.
- Less supply of freshwater, desert area around.
- Low temperatures, ample supply of river water.
- Continental location, desert around, low rainfall.
Give reason.
Salinity is low in the land-locked Baltic Sea.
Give reason.
Oceans located at the same latitude do not have same salinity.
Give reason.
Salinity increases in the mid-latitudinal zones.
What are the factors affecting the salinity of the sea water?
Complete the table showing the salinity of open and land-locked seas.
Evaporation of water | Supply of freshwater | |||||
Region | Latitude | Solar energy | Rainfall | River water | Snow water | Average salinity |
Equatorial | 0° to 15° | High | Perennial | High | ________ | 34‰ |
Tropical | 15° to 35° | __________ | Seasonal | ________ | ________ | 37‰ |
Temperature | 35° to 65° | Low | ___________ | ________ | ________ | 33‰ |
Polar | 65° to 90° | __________ | ___________ | Low | ample | 31‰ |
Landlocked sea | Solar energy | Rainfall | River water | Snow water | Average salinity | |
Mediterranean Sea | High | Low | Low | _______ | 39‰ | |
Red Sea | _______ | _______ | _______ | _______ | 41‰ | |
Baltic Sea | Low | _______ | Medium | _______ | 7‰ | |
Dead Sea | _______ | Very low | Very less | _______ | 332‰ | |
Caspian Sea | _______ | ______ | ______ | ______ | 155‰ | |
Great Salt lake | medium | ______ | ______ | ______ | 220‰ |