iris.edu 에서 제공하는 자료를 이용한다. https://www.iris.edu/hq/inclass/lesson/determining_and_measuring_earths_layered_interior Determining and Measuring Earth's Layered Interior- Incorporated Research Institutions for Seismology Students work first in small groups, and then as a whole class to compare predicted seismic wave travel times, generated by students from a scaled Earth model, to observed seismic ..