The big question addressed in lab, and a description of what you did.
How are rock formations created? We did some work in lab with sand samples and examples of physical weathering. Most of the sand was eroded from either glaciers, water, or wind. These samples were from all over the world and were able to help us understand how they got eroded. We learned about the law of superposition and how to tell which rocks are the youngest.
A description of what you learned in Thursday's lecture.
In lecture, we learned about water disposition and Archimedes Law. We learned about the history and the story of Archimedes and the crown for the king. We learned about density and how it relates to geodes too.
Answer questions about the weekly textbook reading:
What did you learn? I learned that even though the three types of rocks are distinct and very different, they can all become another. Igneous can become metamorphic by undergoing heat and pressure, and can become sedimentary by weathering and erosion, then compaction and cementation. Metamorphic rocks can become igneous through melting and cooling, and can become sedimentary by undergoing weathering and erosion, then compactions and cementation. Sedimentary rocks can become metamorphic with heat and pressure and can become igneous by heat, pressure, and melting.
What was most helpful? The graphic of the rock cycle was the most helpful for me. I also liked the analogy for weathering and erosion. Weathering is easy for me to remember, but erosion is hard to remember as transporting and not just the same thing as weathering.
What do you need more information on? Weathering by glaciers and how it happens.
What questions/concerns/comments do you have? How does weathering by glaciers happen?
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