3. The history of Sir Isaac Newton’s study of gravity does which of the following?
A. Illustrates how a theory becomes a law
B. Provides an example of a theory that has been discredited
C. Demonstrates the importance of gravity in marine science
D. Shows that theories have long been an important part of science
4. All of the following are true of surface currents EXCEPT
A. they are influenced by wind.
B. they can exist in large lakes.
C. they are found in the top 1,300 feet of the ocean.
D. they have the same movement as thermohaline currents.