Answer:
This model is limited because it shows the ASTRONOMICAL distance between each planet as being equal
Step-by-step explanation:
The model is lacking / limited in its astronomical distancing between the planets since the planets were scaled to the exact/actual size of the planets, the spacing between the planets should as well be scaled to the actual distancing between the planets and not just placed at 5 cm apart from each other.
This is because some planets are farther from each other and this is dependent on their position on the orbit hence the model been created by the student is limited in this aspect.