This program takes students on a journey through geologic time starting with the formation of Earth. The concept of geologic time is discussed, and highlights of the four major geologic eras are described. Live action footage filmed on location reveals ways scientists uncover clues about geologic events. Changes in Earth's life and climate are addressed. Other terminology includes: era, period, Precambrian, Paleozoic, Mesozoic, Cenozoic, rock layering, unconformity, absolute age, and relative age.

Originally released by Visual Learning, 2005. Streaming video file encoded with permission for digital streaming by Infobase on April 18, 2015.

Describing Earth's History (2:21); --Uniformitarianism (1:57); -- Geologic Time (2:32); -- Geologic Time Scale (2:17); -- Precambrian Era (2:13); -- The Paleozoic Era (1:51); -- Mesozoic Era (1:32); -- The Cenozoic Era (1:23); -- Summing Up (1:22); -- Video Assessment (3:04); -- Credits: A Journey Through Geologic Time (0:37); -- Geologic Time (0:00); -- A Journey through geologic time 1 (9:56); -- A journey through time 2 (5:34); -- A journey through time 3 (1:07); -- A Journey Through Time 2 (0:00);.