Rock Cycle Comic Strip
Texto do Storyboard
- 4.5 billion of years ago the atmosphere was primarily composed of Hydrogen and Helium.
- The oxygen levels were about 15 percent to around 19 percent.
- At this time dinosaurs breathed air that was far higher in oxygen than ours and lived in far more flammable woods and grasslands than we do.
- Carbon dioxide levels in the atmosphere during the ice age were extremely low, at around 180 parts per million.
- For awhile I hanged out here with the atmosphere that is filled with 21 % oxygen and 0.04% carbon dioxide.
- At this time I met people which aren't very nice sometimes because they kick me around.
- Nowadays the carbon dioxide in the atmosphere is rising and is surprisingly half way to unsafe levels for humans
- After being washed down to the ocean, I got broken down into tiny rocks in the sand. If only humans would stop burning fossil fuels and start using green energy so carbon dioxide levels could decrease.
Mais de 30 milhões de storyboards criados