Ocean Quiz Review Part 1

What is the most abundant salt in the sea?

• calcium chloride
• potassium chloride
• magnesium chloride
• sodium chloride

Which of the following is not a process that decreases the salinity of seawater?

• runoff from land
• icebergs melting
• precipitation
• evaporation

The highest salinity would be found in which of the following areas?

• an area with high rates of precipitation
• an area with high rates of evaporation
• an area with plenty of runoff
• all of the above

The ocean layer of rapid temperature change with depth is known as the 

• trophic level
• deep zone
• mixed zone
• themocline

Which layer of the ocean experiences rapid change in density with depth?

• deep zone
• thermocline
• pynocline
• mixed zone

What is density?

• mass-per-unit volume
• mass-per-unit area
• weight-per-unit mass
• weight-per-unit volume

In addition to salinity, what factor affects the density of seawater?

• depth
• latitude
• temperature
• salt content

Which of the following properties most determine water's vertical position in the ocean?

• organic content
• density
• velocity
• ocean content

Where would you find the lowest density seawater?

• surface zone
• deep zone
• transition zone
• abyssal zone

The energy that drives surface ocean currents comes from

• salinity variation
• wind
• temperature differences
• wave action