Question

what do you mean by models

Answer 1

A model of an object is a physical representation that shows what it looks like or how it works. The model is often smaller than the object it represents. ... If someone such as a scientist models a system or process, they make an accurate theoretical description of it in order to understand or explain how it works.

Answer 2

Model is a systematic description of an object or phenomenon that shares important characteristics with the object or phenomenon. Scientific models can be material, visual, mathematical, or computational and are often used in the construction of scientific theories.
Examples of SCIENTIFIC Model: A model of the motions of the sun, moon and earth (which you participated in last year) A Model of predicting eclipses.Models that explain weather phenomena can be used to predict weather.