Integrating Technology: Seeing Atoms: STM
9th - 11th
In this atom worksheet, students learn about the scanning tunneling microscope and answer questions about its use, how it works and its ability to see electrons in atoms.
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Extensive reading is done in order to learn about scanning probe microscopy and nanoscale. Afterward, individuals use a pencil to probe an unidentified object that is inside of a box so that they cannot see it. Using only what they could gather via the probe, they draw the object.
A Model of a Scanning Tunneling Microscope
Ninth graders explain how a scanning tunneling microscope works. In this chemistry activity, 9th graders construct atomic models and simulate how their images appear under the STM. They discuss the limitations of their atomic model.
In this chemistry review learning exercise, students read about atoms and the periodic table and they complete a chart using the periodic table to find the atomic number, atomic mass and group of given elements. Students answer 5 questions about the elements and they make a bar graph of the mass numbers of the 10 most common elements in living organisms.
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Young scholars work together in groups to research a topic related to the atomic bomb. They create a worksheet summarizing the information they gathered and write a letter to John Dalton discussing the advancements in atomic theory.
Measuring with a Microscope
After considering the importance of scale, microbiologists measure the field of view for the 40X and 100X objectives of a compound light microscope. With this information, they calculate the size of a paramecium and a corn stem cell. They also calculate the field of view for the high power objective so that they can use it to determine size. Because of the math and cognitive ability required, the lesson is geared toward high school biology scholars. A well-written lab sheet is provided.
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