This show tells the story of how summer fun suffers a setback when the tree house detectives discover that their favorite spot on the beach is shrinking. The detectives dig in and learn more about weathering, erosion, the rock cycle, and much more. This show is part of the NASA SCI Files series of instructional programs consisting of broadcast, print, and online elements. Emphasizing research and ... Full description.

This book of 19 essays, written by Earth scientists, provides insight into the dynamic processes that shape the Earth. The essays are supported by case studies describing a range of research projects (including Looking for Life in Antarctica-and Mars, Mapping Mt. Rainer, and Mapping Hot Springs on the Deep Ocean Floor) and profiles of historically significant Earth scientists (Including Inge Lehmann, ... Full description.

This document describes how geologic time is approached in discussions of geologic topics. The uses of relative time and absolute time are compared, and a geologic time scale is provided to represent both concepts. References are provided. Full description.

This page features a geological time scale that divides Earth's history into eras, periods, and epochs, and coordinates these divisions with biological developments. Full description.

This online calculator helps students understand the classic analogy of relating the geologic time scale to a yard stick. It will help reinforce the concept of the briefness of human history relative to the age of the Earth. Full description.

This sub-site of the University of California's Museum of Paleontology contains very detailed section on the Precambrian time period. The site includes a clickable timescale with detailed descriptions of the Hadean, Archean, Paleoproterozoic, Mesoproterozoic and Neoproterozoic time periods. Full description.

This website contains a detailed, annotated geologic time line. The timeline spans Precambrian to Quaternary time detailing geologic developments and life forms of the time. Descriptions contain clickable terms and images revealing detailed information on specific life forms. Full description.

This site from SERC's Starting Point presents sample Gallery Walk questions about time and earth history. Topics that students are asked to write about include the manner in which geologic, climatic, and floral events shaped the evolution of animals through the PreCambrian, Paleozoic, Mesozoic, and Cenozoic Eras. The questions are organized according to the cognitive level at which students are engaged, ... Full description.

This spiral graph visualization, which includes both marine and terrestrial components, represents 4.5 billion years of geologic time. Stratigraphy, paleontology, and geochronology study results provide evidence in support of this old earth. This graphical representation is from an article called Age of the Earth. Full description.

This is an interactive exercise about Geologic Time. It focuses on how geologists and archaeologists determine the ages of rocks and ancient artifacts. This is a beta release of an instructional activity still under development. Virtual Dating contains two modules as well as a demonstration version. One module is Virtual Dating Isochron for rocks and minerals and the other is Virtual Dating Radiocarbon ... Full description.