Week 11 Blog

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 Lab: 

This week in the lab, we worked with our groups to examine samples with the microscope. We looked at eleven different samples to decide if they were developed through water, glacier, or wind. For some of the samples, it was hard to decide how they were developed. We thought most of the samples were developed by glaciers, but after analyzing the correct answers, we realized our results were very different. 





Lecture: 

I learned that something more dense than water will sink. The diet coke has less sugar than the other pops so it floated. Water displacement can help collect accurate measurements. The container needs to be completely full and you need to measure how much water is displaced from the container to get accurate results. 


Pressbook:

In the pressbook reading I learned if the specific gravity formula equals 2.7, it's likely the geode is solid quartz. Like the experiment we did in lecture, if the formula is less than 2.7 the geode is probably more hollow with crystals inside. The reading also explains the two types of weathering: mechanical (physical) and chemical. Mechanical weathering breaks down the rock through water, wind, etc. Chemical weathering changes the molecular structure of the rock. I liked how the book made the difference easy to remember, the weathering makes the mess and the erosion cleans it up. 









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