Week 11

 

1. What did you do in lab? 

This week in lab, we began discussing the Law of Superposition, which states that the oldest layer within a sequence of rocks is at the base and the layers are progressively younger with ascending order. We looked at many rock diagrams and tried to figure out if we could tell which layers were the oldest and which were the youngest. We then talked about the different characteristics of sand and how to tell if it is created through water, glacier, or wind erosion. We looked at 11 different samples of sand underneath a microscope and tried to see if we could figure out how the sand was created. 

2. What did you learn in Thursday's lecture?

In class on Thursday, we talked about if cans of soda will float or sink and what kind of ingredients can affect this fact. We then talked about the Archimedes Law and how that relates to specific gravity. The formula for that is the following: W(air) / W(air) - W(water). 

Pressbook Chapter 17: Rocks and the Rock Cycle 

• In this chapter, I learned about the difference between igneous, metamorphic, and sedimentary rocks and how they make up a continuous rock cycle. 
• The diagram of the three rock types was the most helpful part to me, because the arrows made it helpful to know how the order of the cycle works. 
• I think at this time I would need some further information on geodes. 

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

I really liked this weeks lab, because using microscopes has always interested me.