Week 11

 1. What did you do in Lab?

• Discussed the previous weeks homework, "Sweater Article"
• Learned about the law of superposition
• Rocks that are further down are older. This helps determine the relative ages of layers of rock.
• An intrusion is the youngest of the rock that it goes through
• Determined oldest -> youngest in layers of rock
• Discussed weathering and erosion
• the process by which rocks are attacked by the environment
• Characteristics of sand activity with a microscope

2. What was the big question?

What are the different types of erosion and what do they form?

3. What did you learn in Thursday Discussion?

• Buoyancy/ water displacement experiment 
• Archimedes principle
• Geode is the Iowa state rock
• You can use gravity to determine if a geode is hollow

4. Textbook

       1. What did you learn?

• Rocks are classified as three types:
• Igneous
• Sedimentary
• Metamorphic
• The key processes in the rock cycle are heat and pressure and weathering and erosion
• A geode forms when a cavity forms in a rock
• There are two types of weathering:
• Mechanical
• Chemical
• After weathering, erosion can occur and deposition happens last
• Sand is any rocky material that is bigger in size than silt and smaller than gravel. Sand is created when rocks are weathered by water or wind.

       2. What was most helpful? 

It was helpful to learn about the different classifications of rock. I previously knew these terms but did not know what they meant and what characteristics are in each category. It was also helpful to learn more about sand. Sand is something that almost everyone encounters but never really thinks about. It is useful to now know how sand is formed and where different types of sand are likely to be found.  

       3. What do you need more information on? 

I would like to know more about the different colors of sand. I think students would find this really interesting and would pique their curiosity.