The tree house detectives are concerned about a tremor that they felt while working in the tree house. Unsure if they had just experienced an earthquake, they decide to call a seismologist to find the answer. They soon realize that it isn't that simple. As the detectives begin their research, they stop by to see Dr. D, who provides them with information on the various layers of the Earth and how fossils help scientists discover the Earth's movement. Dr. D also tells them to think "outside of the box" because the answer is not always obvious. Jacob is on vacation in Utah and visits David Whitman at Dinosaur National Monument to gather some important clues and to learn about the continental drift theory and plate tectonics.

Produced by NASA Langley Research Center's Office of Educational Programs. For additional information, visit their web site at http://scifiles.larc.nasa.gov

 

Captioned for the Hearing Impaired