The information that ice cores and tree rings provide about the Earth's past climate is that
Ice Cores - when air bubbles and the massive ice itself and the amount of dust that are trapped in its way it changes the temperature, humidity, atmospheric circulation, volcanic activity, amount of the sea ice, and the pollution. A seasonal variation in atmospheric dust allows us to set apart the difference between the most recent layers and the older layers. The older layers seem to be no different than the recent because of the way it is compacted and the pressure against it.
In Sample 6, as more snow fall on the on the layer before it (older layer) it allows it to re-crystallize once again.



Tree Rings - In sample 13, my group and I examined the tree rings and if you look closely you can see that the outer most rings are thick. It also illustrates that the thin rings closer to the core imply that the season during the time was dry. (1441 to 1931)


The types of greenhouse gases that are important to Earth are water vapor, carbon dioxide, methane, nitrous oxide, and the ozone. The most important one is water vapor because without it the Earth’s temperature will drop to a freezing point and below. Scientists believe that carbon dioxide is another way of keep the Earth at a warm temperature. It was said that due to the burning of fossil fuels that it has increased the quantity of carbon dioxide tremendously. Another contribution to the warming is the solar radiation. As radiation tries to escape, some of the warm heat is trapped by the green house gases.


My group and I experimented with the different levels of fossil fuels, Co2 and the extinction of the human race. We maximized the Co2 level and the result is that if this would happen, in the next 75 years all human kind would be extinct. HOWEVER, the level of Co2 will set the land back to the pre-industrial revolution period.




Here are some other exhibits we saw after our assignment:





I liked the tribal and native American exhibit the most! it was so fascinating to me how they lived life in the wild with only the natural resources around them. I would never be able to live like them. Without shampoo, comfortable shoes, and a source of real nutritonal food. I don't think I would make it through a day like that.