Week 11

 What did you do in lab today?

- Went over the sweater article 

- Law of Superposition: the rocks that are further down are older. 

- Intrusions are younger than every layer they go through. 

- sand created through water is polished, smooth, and generally smaller in size.

- sand created through glaciers is polished, smooth, and generally irregular in size. 

- sand created through wind is opaque, frosted, pitted, and very fine grained. 

#6 from lab we thought was sand created through wind because it is smaller/grainy in size. 

#11- Oolitic sand- only found in three places on earth, Muscatine being one of them. 

- rivers come in different “ages” that are not related to how “old” they are, but the energy they possess. 

Young rivers carve down, have lots of energy, and tear apart the land, eroding all that it can due to energy from gravity. They can move material of any size and have similar characteristics:

1.Whitewater

2.Boulders

3.Fast flowing

2.Old rivers meander from side to side, have less energy, and carry fine sediment.  Think of the Mississippi river.

1.They have oxbow lakes

2.They ”eat” at the banks of the river

What was the big question?

Layers of the Earth and sand erosion 

What did you learn in Thursday’s discussion?

- we looked at different cans to see which ones would sink and which ones would float. The less dense cans floated. These were root beer and the IPA that floated. Pepsi sunk because it is more dense. 

- specific gravity = W (air)(W (air) - W (water))

- Gold is never 100% gold because it would crumble at the touch. That’s why jewelry/things usually say 14K or 24K because that is the amount of actual gold in it.

 

Read the online textbook, chapter 5: https://pressbooks.uiowa.edu/methodsii/chapter/earth/

1.What did you learn?

A geode is a rock containing a cavity lined with crystals or other mineral matter

Archimedes’ principle says that the weight of the displaced liquid is equal to the weight of the object.

What was most helpful?

Weathering is making the mess and erosion is cleaning it up. 

What do you need more information on?

- erosion

5.

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

- none