The us constitution gives the legislative branch the power to make laws. what is this an example of?
a)federalism
b)separation of powers
c)implied powers
d)forbidden powers

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.