Learners will build an open spectrograph to calculate the angle the light …
Learners will build an open spectrograph to calculate the angle the light is transmitted through a holographic diffraction grating. After finding the desired angles, the students will design their own spectrograph using the information learned. The activity is part of Project Spectra, a science and engineering program for middle-high school students, focusing on how light is used to explore the Solar System.
Pre-service Midle School teachers devised an experiment to test an assertion that …
Pre-service Midle School teachers devised an experiment to test an assertion that destruction of the Brazilian Rainforest would lead to a serious drop in atmospheric oxygen. The experiment proved to be a failure, but opened other avenues of science learning and had a positive impact on their confidence in teaching inquiry-based science.
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This activity involves using XRD to determine the chemical composition, state of …
This activity involves using XRD to determine the chemical composition, state of order, molar volume, and density of a monoclinic alkali feldspar.
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This is a three-week lab sequence aimed at determining the approximate amount …
This is a three-week lab sequence aimed at determining the approximate amount of carbon stored in a local bog and teaching skills for solving complex problems through collaborative work.
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Students determine the energy efficiency of different methods of heating substances in …
Students determine the energy efficiency of different methods of heating substances in the lab and then assess the economic and environmental costs.
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This activity is divided into two parts - 1) Using data from …
This activity is divided into two parts - 1) Using data from primary literature to calculate mantle potential temperature beneath a ridge and an oceanic island ("hotspot"). 2) Using the transition zone thickness observed beneath a "hotspot" (Hawaii) to analyze contributions from anomalous temperature and composition. In addition to the student activity sheets, an Excel key, instructor notes, and student handouts are included below.
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This activity is an inquiry lab where students observe the effects of …
This activity is an inquiry lab where students observe the effects of temperature change on nitrogen dioxide gas, a common component of polluted air, to determine its color.
In this field lab activity, students will determine the density, pH and …
In this field lab activity, students will determine the density, pH and water content of prairie soil, transition soil, woods soil, and riverbed soil and compare their findings.
Descripción del curso: El "Manual de técnicas de laboratorio digital" desarrollado por …
Descripción del curso: El "Manual de técnicas de laboratorio digital" desarrollado por el MIT, es una serie de videos diseñados para ayudar al alumno a prepararse para sus prácticas de laboratorio de Química Orgánica. Cada video proporciona una demostración detallada de una técnica de laboratorio, así como información y consejos útiles. Estos videos están pensados para complementar, y no reemplazar, el manual de laboratorio del alumno y los guiones de prácticas. De hecho, se beneficiará más de ver los videos si ya ha leído sus guiones.
The purpose of this week's lab is to - prepare calibration standards …
The purpose of this week's lab is to - prepare calibration standards - use a UV-Vis spectrometer to determine the spectral peaks for several dye solutions, and create a calibration curve - calculate how much of each single-element standard solution is needed to make a multi-element stock solution
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This contribution is modified from a published exercise "Directed Discovery of Crystal …
This contribution is modified from a published exercise "Directed Discovery of Crystal Structures Using Ball-and-Stick Models" [Mogk, 1997] . While the published exercise is based on student exploration of traditional ball-and-stick models of crystal structures, this modified version uses a similar "discovery-based" approach to teach the spatial relationships and crystal-chemical rules that govern the crystal structures of common minerals and crystalline solids, but instead uses the latest web-based crystallographic information and visualization programs. A few changes in the content have been made from the published exercise, mainly to accomodate the new digital media.
(Note: this resource was added to OER Commons as part of a batch upload of over 2,200 records. If you notice an issue with the quality of the metadata, please let us know by using the 'report' button and we will flag it for consideration.)
This contribution is modified from a published exercise "Directed Discovery of Crystal …
This contribution is modified from a published exercise "Directed Discovery of Crystal Structures Using Ball-and-Stick Models" [Mogk, 1997] . While the published exercise is based on student exploration of traditional ball-and-stick models of crystal structures, this modified version uses a similar "discovery-based" approach and the latest online crystallographic information and visualization software to teach the spatial relationships and crystal-chemical rules that govern the crystal structures of common minerals and crystalline solids. A few changes in the content have been made from the published exercise, mainly to accommodate the new digital media.
(Note: this resource was added to OER Commons as part of a batch upload of over 2,200 records. If you notice an issue with the quality of the metadata, please let us know by using the 'report' button and we will flag it for consideration.)
In this series of exercises, a kind of reductionist approach is used …
In this series of exercises, a kind of reductionist approach is used to direct the students attention to specific characteristics of a variety of ball and stick models. Through a series of leading questions, students must focus on specific relationships and must rationalize these relationships according to the fundamental principles of crystal chemistry and crystallography. In this way, students will simulate and replicate the kinds of questions we would normally ask in our professional careers as mineralogists. This approach also addresses other major recommendations from Project 2061: start with questions about nature, and concentrate on the collection and use of evidence. Other questions ask students to make connections to basic chemistry (e.g. bond types, relative strength of bonds, bond angles), determinative mineralogy (most likely place to develop cleavage), analytical techniques (e.g. preferred orientations for X-ray analysis), and so on. The final reflection questions will allow students to "discover" Pauling's Rules, a much more effective learning strategy than simple memorization of these rules (commonly with little or no understanding on the part of the students).
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In this activity, students investigate different methods (aeration and filtering) for removing …
In this activity, students investigate different methods (aeration and filtering) for removing pollutants from water. They will design and build their own water filters.
This activity is a field investigation where students will observe three areas …
This activity is a field investigation where students will observe three areas with high sensitivity to pollution, and test water quality in two of the locations.
Students demonstrate the erythrocyte sedimentation rate test (ESR test) using a blood …
Students demonstrate the erythrocyte sedimentation rate test (ESR test) using a blood model composed of tomato juice, petroleum jelly and olive oil. They simulate different disease conditions, including rheumatoid arthritis, anemia, leukocytosis and sickle-cell anemia, by making appropriate variations in the particle as well as in the fluid matrix. Students measure the ESR for each sample blood model, correlate the ESR values with disease conditions and confirm that diseases alter blood composition and properties. During the activity, students learn that when non-coagulated blood is let to stand in a tube, the red blood cells separate and fall to the bottom of the tube, resulting in a sediment and a clear liquid called serum. The height in millimeters of the clear liquid on top of the sediment in a time period of one hour is taken as the sedimentation rate. If a disease is present, this ESR value deviates from the normal, disease-free value. Different diseases cause different ESR values because blood composition and properties, such as density and viscosity, are altered differently by different diseases. Thus, the ESR test serves as a real-world diagnostic screening test to identify indications of the presence of any diseases in people.
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