Different models can be used to represent the same thing. What kind
of a model to use and how complex it should be depends on its purpose.
The usefulness of a model may be limited if it is too simple or if it is
needlessly complicated. Choosing a useful model is one of the instances
in which intuition and creativity come into play in science, mathematics,
and engineering.
NSES Content Standard A
Science as Inquiry: Abilities necessary to do scientific inquiry Grades 5-8, page 145 Develop descriptions, explanations, predictions, and models using evidence. Students should base their explanation on what they observed, and as they develop cognitive skills, they should be able to differentiate explanation from description--providing causes for effects and establishing relationships based on evidence and logical argument. This standard requires a subject matter knowledge base so the students can effectively conduct investigations, because developing explanations establishes connections between the content of science and the contexts within which students develop new knowledge. NSES Content Standard A
NSES Content Standard E
See also the general discussion in Unifying Concepts and Processes:
Evidence, models, and explanation.
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