1 According to the text, what was the
Mayan civilization?
А
the oldest of the three largest
civilizations in the New World
B the oldest of the three largest
civilizations encountered by the Spanish
С
the oldest of the three largest
civilizations in South and Central America
D the oldest of the three largest
civilizations in Europe

Which statement is a good description of a model? a) models are a description of nature based only on one or two variables. b) models are testable ideas but they are not very to most people. c) models are a description of nature that predicts more accurately than real events. d) models are an approximiation of a real system that omits all but most essential variables in a system.