Zachary wants to model a landform that changed due to earthquakes and wind erosion. Which model is most appropriate for him to use?
an illustratic showing the original appearance of the landform
a diagram showing cracks in the Earth from an earthquake
an oversimplified diagram depicting the cause of the earthquake
an illustration including only the contribution of wind erosion to the landform change

In vapor-liquid equilibrium in a binary mixture, both components are generally present in both phases. how many degrees of freedom are there for such a system? the reaction between nitrogen and hydrogen to form ammonia occurs in the gas phase. how many degrees of freedom are there for this system? steam and coal react at high temperatures to form hydrogen, carbon monoxide, carbon dioxide, and methane. the following reactions have been suggested as being involved in the chemical transformation: