Which of the Following Are Examples of How Physical Geographers

Multiple Choice

Which of the following are examples of how physical geographers use the scientific method?

A) collecting water samples from a number of streams and conducting chemical analyses on them to test the hypothesis that water in streams in the region is acidic
B) mapping the distribution of a particular soil type across the United States
C) collecting land-cover data from a series of aerial images and examining the change in different types of land cover through time to test the hypothesis that the amount of agricultural area in a particular region has decreased over time.
D) all of these
E) a and c only