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Rocks

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This laboratory has two separate goals.  To learn how rocks are characterized To learn to build a slide deck using mobile apps Questions to be explored in the laboratory: What are the three basic types of rocks? What is rock hardness? What is rock luster? What is rock breakage? What is rock color streak? What is the identification of your rock? On Pohnpei there are essentially two types of rocks. The black colored rock is basalt, a combination of minerals produced by the volcanic eruptions that formed the island. Basalt can be composed of different minerals. Basalt on Pohnpei contains iron which oxidizes to form red and brown colors. The red clay soils are also high in iron. There is so much iron in the ground that well water in some places has too much iron to be consumed by us. Out in Nett there is a special facility that removes iron from the well water. The other type of rock is coral, usually a white color. Coral is not a mineral because the origin of coral is in a living anim...
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10.2 From confidence intervals to hypothesis testing

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Section 10.1 introduced using confidence intervals for hypothesis testing.  Spreadsheet In the above fibobelly exercise the tested value was 1.618, the golden ratio. There exists a theory that that the distance from the ground to the belly button divided by the distance from the belly button to the top of the head is the Fibonacci ratio 1.618.  The female confidence interval did not capture the test value of 1.618, the male confidence could not rule out the golden ratio as being the male fibobelly ratio. Desmos The shift to 10.2 hypothesis testing with the t-statistic was supported by Desmos files. Above the t-statistic for the females is out beyond the upper t-critical. Values from the spreadsheet were entered into Desmos. Desmos For the males the t-statistic is not beyond the t-statistic.
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Water conduction in celery xylem

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A plastic storage container was filled with water the day before against the possibility of the water being off on lab day. The storage container permits cutting the celery underwater. This proved necessary after the lab failed two years ago when the celery was cut in open air. Some of the lessons learned and countermeasures were outlined on the board. The calculations were after 30 minutes. Rulers were forgotten this term. The celery worked better than expected. All stalks. The Erlenmeyer flasks were all filled to 100 ml. 100 ml proved sufficient. Red dye was added drop by drop. An initial load of two drops was insufficient. Three more didn't make a lot of difference. More drops were added, perhaps ten to a dozen per flask. The resulting dyed water was perhaps not as dark as last year. This made seeing the conduction hard to impossible. Yet the low dye amounts might explain the subsequent rapid rise of the dye...
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9.2 Paper aircraft flight distances

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On the way to work the idea of throwing the paper aircraft off of the mezzanine crystalized when the resolution to the lack of a pre-existing population mean was realized to be having the students predict the flight distances.  The mezzanine is very nicely appointed at this time. The students were asked to guess distances in feet as this would be the measurement system with which they are most familiar. To help the students visualize the space, the above image was prepared. Note that lanai is a Hawaiian word. The student union has roughly the layout of a nahs, a U shaped two level structure. The equivalent place in a nahs is called either nan kadei (towards the high titles at the front) or nan pahpei (towards the back, towards the apwin dies). Note that these are 1978 old system spellings. Reference the Pohnpei cultural documents specifically page five and eight .  The tape measure is anchored by the Tripltek directly under the mezzanine r...
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