week 11 science 2

 The big question addressed in lab, and a description of what you did.

We started lab having small and whole group discussion about formative assessments and teaching students based off of their questions. Next, we did an activity to determine 'who came first' which translates to how we are currently learning about things in earths history that occured first. We did an invesigation to determine what came fist in the principle of superposition. 

- rocks form layers that become buried under more layers over time, the deeper we dig, the farther back in time we see. Fossils found deeper and deeper mean it gets older and older. 

We also looked at the layers of earth. 

1. sandstone 

2. mudstone 

3. limestone

4. volcanic ash 

5. granite (shifts up, lead to fault line) 

sand created through water is polished, smooth, similar in size 

glaciers, polished, smooth, irregualr in size 

wind 

A description of what you learned in Thursday's lecture.

Give an example of one type of erosion and what it looks like (what it forms) 

- water erosion 

- Geode - state rock of Iowa, crystals inside of it 

- density and specifc gravitty can tell us if a geode is hallow 

we reviewed an experiment to determine specifc gravity - archimedes law and geodes 

specfic gravity = w(air)/(w(air) - w (water))

Answer questions about the weekly textbook reading

What did you learn?

I learned that there are two different types of igneous rocks, intrusive and extrusive. 

Intrusive rocks occur when magma cools underground, slowly. It forms larger crystals. Extrusive rocks are formed when magm cools in water or on earths surface, when a volcano erupts it cools quickly - forms smaller crystals. 

I also learned more in depth of how the rock cycle works, I understood most of it from lecture and lab, however looking at the picture in the textbook is helpful. 

Today in lecture we went over Archimedes principle, the book provided a more in depth definition. 

- the weight of displaced liquid is eqaul to the weight of the object 

What was most helpful?

It was helpful to review how sand is created - rocky material that is created by rocks that are weathered/broken down by either water or wind. 

Wind - sand in the dunes/desert (same in size, scratched/frosted, pitted) 

water - rocks near water/ beach (smooth, rounded, polished) 

What do you need more information on?

More examples of finding specifc gravity would be helpful, maybe doing another example in lab next week before the test. 

What questions/concerns/comments do you have?

Will we need to use the formula to test specifc gravity on the exam?