This globe, from the 1490s, shows the Atlantic Ocean. Which of the following continents are missing from the globe? Check all of the boxes that apply.

North America

South America

Africa

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.