Question

scientific models can never be changed

Answer 1

is this a statement or a question :)?

Answer 2

Haha!

Scientific modeling is a way to grasp complex ideas. They try to explain something that might be too complex to easily understand. I think the model is based on ideas and data. If a model is wrong, the model should be changed to try to accurately reflect the reality. This process helps people explain complex events.

For an idea of this, you can go to http://en.wikipedia.org/wiki/Scientific_modelling .