Which group would you predict would transfer best to the target radiation problem? a. a group who hears the Russian marriage problem as the source problem
b. a group who hears the mutilated checkboard as the source problem
c. a group who hears the fortress problem as the source problem
d. a group who hears the lightbulb problem as the source problem

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.