Students investigate radioactivity as a tool for measuring geologic time and how geologists use this information to determine the absolute age of rocks or minerals.
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Are All Asteroids' Surfaces the Same Age?
Did you know scientists can tell the age of an asteroid by looking closely at its craters? This final lesson of a six-part series focuses on two asteroids, Gaspra and Ida, in order to demonstrate the concept of dating asteroids. Scholars...
9th - 12th Science CCSS: Adaptable
A Brief History of Geologic Time
How do scientists know the history of Earth before humans—or any mammals—existed? An epic "Eons" series video explains the larger history of geologic time. It highlights the eons, eras, periods, epochs, and ages scientists use to divide...
12 mins 6th - 12th Science CCSS: Adaptable
New Review The Unusual Formation of the Hawaiian Islands
How are the Hawaiian Islands different from other island chains? Discover the surprising geologic history of Hawaii with a video from a cool physics playlist. The narrator takes a hike with some geologists and discusses mantle plume...
9 mins 9th - Higher Ed Science CCSS: Adaptable
Four Ways to Understand the Earth's Age
Cartoon children compare the earth's age to timescales that we understand:a calendar year, the thickness of a book, the human lifespan. This smart film clip is definitely worth adding to your geologic timescale lesson! If you subscribe...
4 mins 6th - 12th Science CCSS: Adaptable