What is the process where materials separate into different layers due to density?

Alaina wants to decide whether her current cell phone plan is better than a package that another company offers. to compare the two plans, she plotted two lines on a graph, where y represented the total cost of one month’s service and x represented the megabytes of data that she used in a month. which part of the graph will represent the cost per megabyte of data used in each plan?

What does the kyoto protocol aim to reduce

What is the difference between the formation and characteristics of intrusive igneous rock and extrusive igneous rock?