The earth is not a uniform sphere but has regions of varying density. consider a simple model of the earth divided into three regions—inner core, outer core, and mantle. each region is taken to have a unique constant density (the average density of that region in the real earth):
a. use this model to predict the average density of the entire earth.
b. the measured radius of the earth is 6371km and its mass is 5.974*1024kg use this data to determine the actual average density of the earth.

[05.02] what is the best explanation of the kinetic molecular theory as it relates to the energy of the molecules in the states of matter? (1 point) the molecules in a gas have greater kinetic energy than those in a liquid, which in turn have greater kinetic energy than the molecules in a solid. kinetic energy cannot be created nor destroyed, and, as a result, all states of matter have the same kinetic energy. the molecules in a gas have greater kinetic energy; therefore, they are more tightly packed than the molecules in either a liquid or a solid. the molecules in gases and liquids, in constant motion, have greater kinetic energy than those in a solid, which do not move or vibrate because their position is fixed.