1) which of the following statements about physical models is not true?
a. physical models are often three-dimensional representations.
b. physical models are used to represent an object or event.
c. physical models are usually in the form of a graph.
d. physical models can be used to depict microscopic objects.

2) which of the following scenarios represents the best use of a scientific model?
a. predicting weather patterns
b. studying the result of mixing two chemicals
c. studying the effect of oil spills on plant growth
d. studying the speed of a ball down an inclined plane