If someone is building a scale model of our solar system which characteristic would be the most difficult to build into the model? 1#The relative sizes of the objects
2#The colors of the objects
3#The distances between objects
4#The composition of the objects

The composition of the objects because not all the planets have been explored

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.

the solar system used to have much dust particles option no d