Models need to be changed as often as deemed necessary by the market. Different types of models need to be changed at different times.
when they are desined to answer a question
Scientific models are continually refined through experimentation. When experimental results, which violate the model, have been confirmed by a third-party then scientists seeks to change the model such that the results can be explained.
well you know these days...
yes they can be changed!Scientific models change to reflect ongoing research to explain discrepancies in current theory versus actual experimental results.
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the atom model
Yes, they certainly can. Modification of intellectual models in the light of new evidence is one of the cornerstones of the scientific process.
I think how have parts of the Earth changed is a hard question but I think it is because people get thirstier and hungrier, people are not happy just the way they are, they need more things such as resorts, mansions, parks, more models of cars etc.
It was found that atoms are made up of even smaller particles (through experiments), and the models changed because how we thought atoms were composed turned out to be wrong, and corrections were made accordingly.
Yes, but on some later models it is not easy.
Probably for style, aerodynamic performance or distinction. my guess though
True
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