Eras, like the paleozoic, mesozoic, and cenozoic periods are separated into periods by which marker? question 4 options: changes in rock layers species extinction 100 million year chunks the types of living organisms that were present

Why is the study of demography important to geographers

Short answer/constructed response: respond to the question in 3-5 complete sentences. give details or examples to support your answer. attempt to answer all parts of the question in paragraph form! using the source 1 map, pick two of the 1800's territorial acquisitions you believe were the most important in the development of the united states. provide at least two reasons per territory to explain why you think they were the most important.

In 1200 bce, the egyptian empire was declining as the civilization was beginning in mesoamerica. a. maya b. oaxaca c. olmec d. teotihuacan