Hi! Scientists use models for a lot of reasons. Primarily to study objects in detail that they wouldn't be able to normally. For example, to study something small like a cell, making a model could be easier. Also, things that are too dangerous to study in real life can be turned into models as well.
To put it shortly, scientists use models to observe things in better detail.
I can include a link to a website if that will help :)
https://study.com/academy/lesson/why-scientists-use-models-simulations.html
Good luck!
