What is sea floor spreading?
-the process by which new seafloor is formed as it moves away from spreading centers in mid-ocean ridges.What are some of the major land forms that are created from plate movement?
-mountains, rift valleys, volcanoes, and ocean trenches.
How were the Mariana Islands formed?
-they were formed by underwater volcanoes along the Marianas Trench.
What evidence exists today that the plates are still moving and that the islands are ancient volcanoes?
-recent volcanic activities, and earthquakes.
What is an atoll?
-a coral reef that develops as a ring around a central lagoon.
Why are atolls mainly found on the Pacific?
-because the Pacific Ocean floor has the most volcanic activities; thus the pacific has many coral reefs.