Science models for class 7 students can be any genius experiments or working models that students can display in their science fair’s or science exhibitions. As the title suggests, this is a scaled representation of an existing invention. You are asked to make a WORKING model that simulates the operation of, and the scientific principles behind, an existing technology. You should choose a model which clearly illustrates a scientific principle. When you think about it, it is easy to understand the importance of models in science.
Many times the objects of a scientist’s attention are too small to be observed directly, or they may be inaccessible for direct visual study, as would be the case for the center of the Earth or the surface of a distant galactic object. These models are intended to educate people about the concept being illustrated. For example, if you wanted to show how electrons flow through a wire you couldn’t use electrons(because they are so small) but would use something large enough to see to represent the electrons.