How does NAFTA directly benefit American families? a.
by producing $17 trillion in goods
b.
by exporting almost $420 billion from the U. S.
c.
by being responsible for 55% of agricultural growth since 1994
d.
by reducing the prices of food and oil

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.

People are willing to pay more for a diamond than for a bottle of water because

Science cannot describe things that a.) are beyond imagination, experience, or human ability b.) cannot be observed, measured, or tested c.) have not been conclusively proven d.) occur without being seen, heard, or felt