How much of the world's table salt is produced by the evaporation of seawater?
a. one-quarter
b. one-third
c. one-half
d. two-thirds
e. three-quarters
Question 2Petroleum most likely formed from which organic substrate?
a. Planktonic organisms and bacteria
b. Fossilized fish
c. Whale falls
d. Water column debris
e. Sea grasses