8.9A, 8.9B Plate Tectonics

Scientists believe that the land masses of Earth were once joined together, forming one huge supercontinent called Pangaea. Over time, the land masses gradually drifted apart to reach their present-day locations. Which of these provides the least support for this theory?

The diagram shows a lab setup designed to model convection currents in Earth’s mantle. The Earth process modeled in this investigation is most likely to cause —

Select the locations on the map where subduction zones are likely to be found.

Select the locations on the map where mid-ocean ridges are likely to be found.

Select the location on the map where this diagram is most accurate.

Which of these features is formed by the separation of the North American and Eurasian tectonic plates?

The map below shows the locations of four active volcanoes in the Caribbean Sea.

What do these volcanoes indicate about plate tectonics in the region?