posted by Anonymous .
Why do scientists use models?
a. Scientists use models to learn about things that are too small, too large, or too complex to observe directly.
b. Scientists use models because doing so is always part of the scientific method.
c. Scientists use models because they always work exactly like the systems they represent.
d. Scientists use models so they have an opportunity to work with their hands.
Which of the following is not a model?
a. an ant farm
b. a bicycle
c. an atlas
d. a plastic human skeleton
My answers are a and b.