Week 11

The big question addressed in lab, and a description of what you did.


In lab, we talked about a lot of different types of rocks, crystals, superposition, erosion, and weathering.




Firstly, we talked about geodes and how a full geode has a density of 2.7. if the density is more than 2.7 it is not a geode. If the geode is less than 2.7 than it is whatever its density divided by 2.7 full. For example, a geode with a density of 1.3 is about half full.


Whenever geodes are brought up I automatically think of two things one the above picture of a grotto that is back home at St. Mary's in West Burlington, across the street from one of my childhood homes. The second is United States Gypsum a mining company where my dad works that mines gypsum which is a mineral found in crystals like geodes. They mine it mainly to make sheetrock.




Next, we reviewed the homework 'Sweater Weather' and road cuts. Example: back home in Sperry, Iowa my first childhood home is on a road named Stony Hollow. There's a story of it being haunted near a cliff, but there is no cliff near where I used to live so one day my cousin and I followed the road all the way and we found no evidence of ghosts but the road eventually turned into what is pictured below. (Not my picture, but same road)







Next, we learned about superposition:

Intrusions/dike: from the mantle, have to grow through things, intrusion is younger than everything it goes through 
oldest bottom ,top youngest 
practiced identifying 
Ali tip: if you don't know what a rock is go with shale.






Erosion and weathering

physical- mostly focusing on this 

 deposition: what left behind    sand, glacier, wind 


Then we looked at different types of sand. Sand that is eroded by water is polished, smooth, and about the same size. Sand that is eroded by wind is opaque, frosted, pitted, and very fine-grained. Lastly, sand that is created by the erosion of glaciers polished, and smooth, but irregular in size.


Muscatine is one of three places this sand that grows exists, 









A description of what you learned in Thursday's lecture.

Do the cans sink or float? Generally, Diet soda cans float because their density is less than 1gm/cc, a regular soda can sink because it is generally slightly over 1 gm/cc.
Archimedes's principle : weight of displaces liquid is equal to weight of the object that displaces it.
Testing if the crown was pure gold 

 Archimedes bath: objects in water make the water rise because it is the same amount of water and it needs to be placed elsewhere.

Answer questions about the weekly textbook reading: Ch 17: Geodes 
 
What did you learn?/What was most helpful?
It was cool to learn that geodes can form in other types of rocks and in multiple ways. 

What do you need more information on? I thnk I am just curious as to why we learn about geodes. They are pretty cool but I guess I might take another look at the standards to see why they are revalvent. 

What questions/concerns/comments do you have

I believe this week was when I had watched "Before the Flood" because one of the questions I had typed was "How do we fix our planet?"I would also like to know if there was a reason for the animal choice in Mr Archimedes's Bath.

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