Week 9

What did you do in lab today?

In lab, we looked at geological time using an earthviewer. We learned how geology can have an affect on many events such as the 2008 presidential election. We then hypothesized where these events fell on a timeline of earth: humans appeared, dinosaurs ruled the earth, first land plants, first land animals, and moon was created. We then placed these on a timeline. After this, we explored significant events in the history of earth using an earthviewer. Each team worked in the range of a billion years and placed these on our timeline as well. We found that humans have not been around very long compared to the other events of earth. 

In order, here are some of the highlights of Earth's history: 

 

1. Earth and moon formed ~4.5 billion years ago (bya) 

2. Oxygen begins to persist in the atmosphere (2.4 bya) 

3. Origin of Chloroplast (1.6 bya) 

4. Cambrian explosion, huge diversity in types of life on Earth, not land animals like we see today (540 mya)  

5. First land plants (470 mya) 

6. First Land vertebrates (375 mya) 

7. Pangaea ( 200 - 300 mya) 

8. Homo Sapiens (2 mya) 


What was the big question?

What are the significant events in the history of the earth? When did each of these occur?

What did you learn in Thursday's discussion?

Took Space quiz. 

Textbook 

What did you learn?

I learned more about plate tectonics. I learned that plate tectonics is a theory that earth's crust is divided into many pieces, called tectonic plates, which move over time due to convection currents in the mantle. I learned that earth's land is constantly shifting and changing over time. These shifts are what created the continents we recognize today. These continents still continue to change over time due to the shifting of plates. 

What was most helpful?

It was most helpful to look at the different images that represent the geologic time scale. I especially like the image of the clock that starts with the formation of earth and ends with first humans at 11:59:40. It was interesting to see how far after animals appeared that humans did. I am curious about why this would be or if there is a reason. 

What do you need more information on?

I need more information on the plate tectonics theory and the theory of continental drift. I am curious how these two differ from each other and why the continental drift theory is not the most accurate theory. 

What questions, concerns, and/or comments do you have?

What are the different evolutions of humans? Such as Homo sapiens?

I would like more information on how volcanoes make it so the feedback loop that caused the snowball earth does not continue. 

Comments

Post a Comment

Popular posts from this blog

Week 13

  What did you do in lab today? In lab, we looked at various graphs of different climate change. We found from the measurement of different variables that climate is overall warming in our area. These graphs showcased a longer growing season, wetter spring, more summer precipitation, wetter springs and summers, higher humidity, and drier autumns. We also looked at how climate change has affected the growth locations of different plant species.  What was the big question? How is climate change specifically happening in Iowa? What did you learn in Thursday's discussion? In lecture, I learned why some regions have a hot climate while others have cold. I learned that one of the factors that plays a role is latitude and that places closer to the North and South poles will have colder temperatures while places near the equator will have warmer temperatures. As well as this, the temperature of an ocean current will affect the temperature of the air that passes over it. Elevation also...
Read more

Week 11

Image
What did you do in lab today? In lab, we first looked at the law of superposition. I learned that this law says that rock layers closer to the surface are younger than rock layers at the bottom. This is the way geologists find the relative dates and ages of different rocks around the globe. We looked at several visuals that showed the law of superposition and determined the oldest to youngest order of the rocks. Through this, I learned that an intrusion or igneous dyke, which was showed in many of the visuals, has to be younger than all the things it's going through. This is because the rocks had to be there before the intrusion went through them. We also reviewed erosion and sand. We had the opportunity to view several different sands under a microscope and learned where each was form.  What was the big question? What is the Law of Superposition? What did you learn in Thursday's discussion? In lab, we examined water displacement/buoyancy. I learned that buoyancy is the ability...
Read more

Blog Post Week 1

  The big question addressed in lab, and a description of what you did. The big question that was addressed in lab this week was, why should elementary students learn about science? Another was, how should elementary students learn about science? After discussing these questions, we watched a video of students playing on a playground and noted what we noticed and wondered. Following this, we explored how we can support play that is exciting but not dangerous. To explore this question more, we did an experiment on how to make a race exciting by ensuring the racers will cross the finish line close to each other. To do this, we measured the distance of our race and the time it took us to walk this distance. After figuring this out, we were able to determine how much time one racer should start before the other to make the race close.  A description of what you learned in Thursday's lecture. In Thursday's lecture we looked at the SEPS, DCI, and CCCs that are in 3-PS2-2. ...
Read more