Question

A scientist would bulid a model to observe what? - how water boil and turns to steam- how high a dog can jump- how cars are built- how the planets revolve around the sun-

Answer 1

How planets revolve around the sun

Step-by-step explanation:

A model involves scaling something down or up to observe it. Obviously you cannot observe every planet in its full size, so this is where the model would come in handy.