[ 383 ] Geography and the World GED ® TEST SOCIAL STUDIES FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • The world population growth rate dropped one percentage point between the mid-1950s and 1960. Which of the following best explains this occurrence? a. The ratio of births to deaths was higher in the mid- 1950s than it was in 1960. b. A baby boom in the decade after World War II caused a spike in the birth rate. c. The introduction of the birth control pill in 1960 in the United States helped to slow the birth rate. d. There were more births in 1960 than there were in the mid-1950s. Which of the following statements is proved by the information in the two graphs? a. The population will reach its limit by 2050. b. When the rate of population growth decreases, so does the population. c. When the rate of population growth increases, so does the population. d. Even though the rate of population growth is decreasing, the population is increasing.