What's the difference between a tornado watch and a tornado warning?

What are the three types of counseling established by marine corps policy?

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

How does science influence the decisions made about social, economic, and political issues?