Problem 1
Fill in the blanks with the correct vocabulary word or words. The __________ of seawater has stayed about the same for hundreds of millions of years.
Problem 1
Which ion makes up 7.7 percent of the ions in seawater? A. calcium C. chloride B. sulfate D. sodium
Problem 2
Which of the following dissolved gases enters ocean water both from the atmosphere and from organisms that photosynthesize? A. carbon C. hydrogen B. nitrogen D. oxygen
Problem 3
Fill in the blanks with the correct vocabulary word or words.
Problem 3
Which of the following terms is used to describe the amount of dissolved salts in seawater? A. density C. salinity B. temperature D. buoyancy
Problem 4
Fill in the blanks with the correct vocabulary word or words.
Along most ocean beaches, a rise and fall of the ocean related to
gravitational pull, or
Problem 4
Which of the following describes upwelling? A. horizontal ocean circulation that brings deep, cold water to the surface B. vertical ocean circulation that brings deep, warm water to the surface C. horizontal ocean circulation that brings deep, warm water to the surface D. vertical ocean circulation that brings deep, cold water to the surface
Problem 5
What is the lowest point on a wave called? A. trough C. crest B. wavelength D. wave height
Problem 6
What is the direction of ocean currents in the southern hemisphere? A. counterclockwise B. north to south only C. clockwise D. east to west only
Problem 7
How does chloride enter the oceans? A) volcanoes C) density currents B) rivers D) groundwater
