The rate at which a parent atom creates daughter atoms is always constant and unique. The process of cell division is a unique occurrence that happens with eukaryotic cells. These parent atoms go through the different phases at a constant phase, but when interruptions in the divisions happen, mutations and abnormality in the cell will take place.
Liquid because the plastic has to be melted to form the desired shape
Weathering and erosion ( they caused water and wind action)
the northern region body of water