Earth History! (Zazi Halla – Fall 2022, Biosphere & Lithosphere)


This website,, shows the progression of Earth all the way back to 750 million years ago during the Cryogenian Period. It is an interactive tool because you can view Earth looked like by changing the time frame (ex: select “what did Earth look like (x) years ago”. Most notably, this shows changes in the lithosphere because Pangea can be seen breaking apart due to tectonic plate movement. This website also connects directly to our lithosphere unit by illustrating places where isostatic rebound can be occurring. For example, students can change the time-scale and see how glaciers have been melting (a cause of isostatic rebound).

This website also connects to the biosphere unit, because there is an option to look at Earth based on what major species were present at the time. For example, you could look at when the first algae on Earth appeared or when the first land animals appeared. Students can try to infer how atmospheric changes influence biomes across Earth and subsequently provide habitable zones for different species over Earth’s history. Additional information is also provided on the diversity of species at the time. For example, when land animals appeared on Earth, it details that during this time “Insects diversify and fish develop sturdy fins, which eventually evolve into limbs”. Very cool stuff!!