Open on a Jamboard After you have completed your graph, answer the following questions.
1. a. Seawater is actually about 96.5 percent water. If you were going to construct a graph to illustrate
the composition of seawater, how many degrees on the graph would be needed to represent water?
b. On such a graph, how many degrees would be needed to represent the total of all of the dissolved
salts contained in seawater?
2. If erosion continues to carry more and more dissolved salts into the oceans, after many thousands of
years, how would you expect the composition of seawater to be different from how is it today?
3. Many animals that live in the ocean use some types of dissolved salts to build their shells. What would
happen to the composition of seawater if these animals were to decrease drastically in number?