Which of the following objects would require the use of a small-scale model? a) an atom b) the planet saturn c) the highway system in florida d) the path of an ocean current.

The one that would require the use of  a small scale model is : atom

an atom is the smallest unit of a chemical element, which means that it's impossible to be seen with a normal vision. Small-scale model would be required in order to observe it

hope this helps

Since wxyz is 4, halfof that would be 2.

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.