Understanding Salinity

Stephanie, a learning scientist, introduces salinity, its measurement methods, and units. She explains factors affecting salinity, such as evaporation and river runoff, and discusses terms for different salinity levels. The importance of salinity in ocean processes and research is highlighted. The video concludes with a promotion for the Salty Science Podcast.

What is the primary method used to measure salinity in water?

• Using a pH meter

• Using a thermometer

• Measuring electrical conductivity

• Weighing the salt content

Which unit was historically used to express salinity?

• Parts per million

• Parts per thousand

• Milligrams per liter

• Grams per liter

What is the practical salinity scale used for?

• Calculating salinity without units

• Measuring temperature

• Determining water density

• Measuring water clarity

What is the average salinity of the global ocean?

• 25

• 30

• 35

• 40

Which of the following is NOT a factor that controls salinity?

• Evaporation

• Precipitation

• River runoff

• Wind speed

What term is used for salinity levels higher than the average ocean salinity?

• Hyper saline

• Brackish

• Oligohaline

• Polyhaline

Which term describes water with lower-than-average salinity?

• Hyper saline

• Brackish

• Medically

• Brine

Which of the following is a term used for average ocean salinity?

• Oligohaline

• Say you hailing

• Polyhaline

• Brine

Why is understanding salinity important for oceanic research?

• It affects the color of the ocean

• It impacts physical, chemical, and biological processes

• It determines the ocean's depth

• It influences the ocean's temperature

How does salinity affect the measurement of dissolved oxygen concentrations?

• It decreases the concentration

• It is necessary to know for accurate measurement

• It increases the concentration

• It has no effect