Week 9 History of Earth

 1. What did you learn in lab this week?

- In our lab section this week, we talked about the timing of when things happened on Earth. We looked at a timeline that started with the creation of our universe or the "Big Bang," and it ended up where we are today. We started off by guessing where we thought some important historical things happened on the timeline, like dinosaurs, human creation, plant creation, etc. Then we realized that our predictions were way off because it has been a lot more time than we actually think. In our table groups, we looked at the Earthviewer website and checked when historical things like the ice age and the creation of oxygen actually happened, and then we calculated them to fit on our smaller-scaled timeline. My group found out when exactly oxygen was introduced onto Earth, and another big one was when the Earth was a snowball. We then went into a further discussion about how the Earth melted from that stage of its lifetime. 

2. What was the big question in the Lab? 

- The big question in our lab section was Geological time.

3. What did you learn in your discussion this week?

-We had an online assessment this week.

4. What did you learn in the press book reading?

While reading the textbook for this week, I learned more about the snowball Earth, which I find incredibly fascinating. I learned that at least three times in Earth's history, our planet has been engulfed entirely in ice. I learned that if we didn't have volcanoes to help melt the ice from the inside of our Earth, then our Earth would never have melted when it did, and we would be nothing, and our Earth would still be a snowball. The carbon dioxide from our volcanos helped to save our planet from a forever cold front. 

5. What do you need more understanding on in the press book reading?

I don't really understand how, if the continents moved from Pangea to where they are today so much, would our continents still be moving, and would they eventually return to a Pangea-like continent?

6. Questions

-Will there be another snowball Earth again?