Part 2: Density & Salinity of Water

What is the key factor that significantly influences the physical properties and characteristics of water in aquatic ecosystems?

• Temperature

• Evaporation

• Density

• Salinity

What is the average salinity of oceans measured in parts per thousand (ppt)?

• 40 ppt

• 25 ppt

• 30 ppt

• 35 ppt

What is the region where temperature changes rapidly with depth, influencing the distribution of marine life?

• Euphotic zone

• Pycnocline

• Halocline

• Thermocline

What is the unit of measurement for salinity?

• Moles per liter (mol/L)

• Grams per liter (g/L)

• Practical salinity units (PSU)

• Parts per million (ppm)

What is the concentration of dissolved salts in water mainly composed of?

• Sodium chloride

• Calcium carbonate

• Potassium nitrate

• Magnesium sulfate

What leads to the formation of distinct layers in bodies of water?

• Evaporation

• Salinity

• Density stratification

• Precipitation

What drives vertical mixing and circulation in oceans and other water bodies?

• Temperature

• Salinity

• Density

• Evaporation

What influences the chemical and biological properties of water bodies?

• Evaporation

• Temperature

• Density

• Salinity

What is the key parameter in aquatic science that impacts the chemical and biological properties of water bodies?

• Temperature

• Salinity

• Evaporation

• Density

What is the process that increases salinity in water?

• Precipitation

• Freshwater input from rivers

• Ice formation

• Evaporation