1) The science that studies population distribution and change is called A) demography. B) geography. C) economy. D) sociology. 2. Canada is bigger than the United States, but only has _____ as many people. A) one-half B) one-fourth C) one-eighth D) one-ninth 3. Advances in all of the following EXCEPT ________ have led to rapid population growth in recent years. A) sanitation B) farming methods C) medicine D) computers