Week 9: History of Earth
Lab
I was not in lab this week, but from what I read and looked at, we thought about when things first appears on earth, such as humans, dinosaurs, plants, and animals. We then placed the answers that we were thinking about on a timeline. We investigated what the significant events in the history of the earth are. Noting the importance of the event, when it happened, and placing it on a timeline. We also brainstormed questions to investigate about earthquakes and volcanoes and how they relate to earth's plate tectonics.
Thursday's Discussion
We had our exam so we did not learn or talk about anything new this time.
Pressbook:
- I learned that earth was formed around 4.65 billion years ago. I learned that humans came about a long time after rocks, prokaryotes, oxygen, organisms, animals, and plants. I also learned that planet earth was in ice a couple of times and this was called the snowball earth. I learned that because of plate tectonics, the land on earth is constantly changing over time. All of earth's land was at one point all put together, but then overtime it has shifted and broken apart.
- The things that were most helpful to me was the timeline of earth and the clock that represents earth's history. I like to look at visuals when trying to make sense of new things and I thought these pictures were helpful.
- I would like more information on the positive feedback loop and when this stopped because I am not sure when the earth stopped being completely covered in ice from the snowball earth.
- Why were humans first appearing on earth at such a specific time, 11:59:40 PM, on the clock thay shows earth's history on a 24-hour day? It confuses me.
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