29 Questions
What is the main reason for the variation in salinity levels in different regions?
Changes in the amount of evaporation and supply of fresh water
What is the effect of increased wind or sunlight on salinity levels?
Increased salinity levels
Which of the following bodies of water has the highest salinity level?
Don Juan Pond in Antarctica
Why can people easily float on the water in the Dead Sea?
The salinity is high enough to change the buoyancy
What is the result of ocean currents mixing in the water column?
Variance in salinity levels
What pattern is observed in the distribution of salinity levels across different latitude belts?
Bands of similar salinity levels
Why is evaporating seawater to measure salinity not an accurate method?
Because some salts leave the water as it evaporates
What is the unit of measurement for salinity?
Grams per kilogram
What is the principle behind hydrometers?
The higher the salinity, the higher the density
Why are two readings needed when using a hydrometer to measure salinity?
To account for temperature changes
What is the purpose of the conversion scale in hydrometer measurements?
To interpret the salinity reading at the indicated temperature
What are the three types of meters that can be used to accurately measure salinity?
Refractometer, Salinometer, and Hydrometer
What is the primary reason why water is called the universal solvent?
It can dissolve a wide variety of substances, but not all
What is the term for the process of salt dissolving in water?
Dissolution
Which of the following layers of the ocean is characterized by the highest salinity?
Halocline
What is the primary driver of thermohaline circulation in the ocean?
Salinity differences
What is the term for the range of saline waters from fresh to brine?
Haline series
Why do freshwater fish need to drink water actively?
To compensate for water loss through their skin by osmosis
What is the primary function of the kidneys in fish that live in both fresh and saltwater?
To adapt to changes in water salinity
What is the chemical symbol for Sodium?
Na
What is the purpose of an estuary for some fish?
To lay or fertilize eggs
What is the term used to describe the measure of salt dissolved in water?
Salinity
Which instrument is used to measure the buoyancy of a liquid?
Hydrometer
What is the term for the separation of an ionically bonded molecule into two or more ions in solution?
Dissociate
Why do fish in seawater excrete excess salt via their gills and kidneys?
To maintain the balance of salt in their body
What is the primary reason why fish in seawater do not need to drink water actively?
They do not lose water through their skin
What is the term for the concentration of dissolved salt in a given volume of water?
Salinity
What is the zone in the ocean where there is a large change in salinity with depth?
Halocline
What is the term for the ratio of density of a particular substance to that of water?
Specific Gravity
Learn about the varying levels of salinity in different bodies of water, including inland seas like the Red Sea and the Dead Sea, and how they affect buoyancy. Discover the range of salinity found in various bodies of water around the globe.
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