def elevation_change(elevation):
	"""
		:param elevation: A list of elevation points (floating point format)
		
	Description:
		Calculates and returns the differences in elevation between two points. This is completed for all sequential pairs in a list.
		Returns deltaElev which is a listing of elevation changes. This has a length of len(elevation) -1
	"""
	deltaElev =[]
	for i in range (0, len(elevation)-1):
		deltaElev.append((elevation[i+1]-elevation[i]))
	return deltaElev