Geologic Age

There are more than 600,000 asteroids in our solar system. Pupils analyze images of two asteroids in order to determine if they are the same age. They count craters for each asteroid and compare numbers. 

Students make observations through 3-D visualizations. They explore scientific and geologic processes through the use of 3-D pictures.

Three class periods are required to carry out this science lesson on glacial movement, the Great Lakes basin, and the lock system that allows travel on the lakes. It is an ambitious undertaking as your class experiments with a glacier...

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...

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...

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...

Students investigae using radioactive decay to determine geologic age.

Students construct a geologic timeline the size of a football field. They work in small groups to calculate the yardage for significant events in the Earth's history and then as a class pace out all of the events.

Hear experts provide evidence of Ice Age and glacial movement based on today's geological features. Various measurement tools are used to see what chemicals are found in ice and the atmosphere in order to determine the climate of the...

Students identify and analyze how the geologic time scale was developed by investigating 11 periods of time and the vast expanse of time of the Earth's existence. They study their period, determine the important factors indicative to...