Which portion of the earth is believed to generate its magnetic field? a. the mantle b. the crust c. the inner core d. the inner and outer cores

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

Plzz on what physical process is responsible for the creation of volcanoes, earthquakes and ocean trenches at the plate margins?

What is most often given a value of zero to describe an object’s position on a straight line? displacement reference point distance ending location