This is a PowerPoint presentation on the Earth's atmosphere and climate change over time. It is based on the California State Science Standards for earth science.
This presentation is a great overview for climate change over time and global warming. It goes over the evolution of the atmosphere over geological time and hits upon volcanic outgassing along with the mutation of cyanobacteria with resulted in the onset of photosynthesis.
I use this powerpoint both in my beginning earth science and general science classes along with my advanced geology class. It will also be a necessary presentation in my AP Environmental Science course next year!