Which of the following is true of Greece?
A. Greece is a small country in Southern Europe.
B. Greece is shaped like an outstretched hand.
C. Greece includes both a mainland and islands.
D. all of the above

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.