Researcher Kotare believes that children who watch large amounts of TV violence will be more likely to engage in aggressive behavior at school. This prediction about the relationship between two or more variables is a(n):.
A. hypothesis.
B. theory.
C. operational definition.
D. conceptual framework.

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.