In creating a model of our living planet, scientists need to consider four major Earth systems. Briefly describe these four systems, and then explain why it is difficult to study these systems individually. in own words please...

sorry :(

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

How many major plates cover the earth

This class has taught you that the use of science and medicine in practical ways has become an international endeavor. one of the greatest examples of an international science accomplishment is which allows the profiling of human dna, useful not only to science but also medicine. a) forensic science b) the fbi c) the human genome project d) bioterrorism