This one page table contains information on Earth's Eons, Eras, and Periods. For each period, a short description of important geologic/life events is given. The chart highlights the current ice age (although we are in an interglacial period within the current ice age) as well as ice ages of the past. An environmental science unit, "Earth's Lithosphere Unit," is available as a bundle and utilizes this geologic timeline. The entire year-long course, "Environmental Science," is also available as a bundle.