OER Commons - Keywords: Measure
https://www.oercommons.org
daily12000-01-01T12:00+00:00Eratosthenes JS Model
https://www.oercommons.org/courses/eratosthenes-js-model
The Eratosthenes JS model displays the shadows cast by two gnomons (sticks) at different locations on Earth. For one gnomon, Sun is directly overhead (as would be the case if the gnomon was on the Tropic of Cancer at the summer solstice). The other gnomon is due north of the first gnomon. The sizes of the gnomons are greatly exaggerated for visibility. This simulation can be used to help illustrate how Eratosthenes was able to measure the diameter of Earth using the shadows cast by two gnomons, one situated due north of the other, on a day when the southerly gnomon cast no shadow at all. The distance between the two gnomons (along Earth's surface) can be adjusted. The length of the shadow is given, and this length can be used to determine the angle between the gnomon lines and from that the circumference (and diameter, radius, etc) of Earth. Earth can be hidden to give a better view of the relevant geometry. The Eratosthenes 2D JS Model was developed using the Easy Java Simulations (EJS) version 5. It is distributed as a ready-to-run html page and requires only a browser with JavaScript support.Mario BelloniTodd TimberlakeHistory, Law, PoliticsMathematicsGeosciencePhysicsSpace ScienceEducation2015-04-08T18:22:23.767939Course Related MaterialsNoon Shadow Model
https://www.oercommons.org/courses/noon-shadow-model
The Noon Shadow model shows the geometry of the shadow cast by a gnomon at noon. Users can change the orientation of the gnomon as well as its latitude. The height of the gnomon and its shadow length are displayed in Earth radius units. Noon Shadow model is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_astronomy_Noon Shadow.jar file will run the program if Java is installed. You can modify this simulation if you have EJS installed by right-clicking within the plot and selecting "Open EJS Model" from the pop-up menu item.Todd TimberlakeWolfgang ChristianHistory, Law, PoliticsMathematicsGeosciencePhysicsSpace ScienceEducation2015-04-08T18:15:34.072678Course Related MaterialsEratosthenes Model
https://www.oercommons.org/courses/eratosthenes-model
The Eratosthenes model displays the shadows cast by two gnomons (sticks) at different locations on Earth. For one gnomon, Sun is directly overhead (as would be the case if the gnomon was on the Tropic of Cancer at the summer solstice). The other gnomon is due north of the first gnomon. The sizes of the gnomons are greatly exaggerated for visibility. This simulation can be used to help illustrate how Eratosthenes was able to measure the diameter of Earth using the shadows cast by two gnomons, one situated due north of the other, on a day when the southerly gnomon cast no shadow at all. The distance between the two gnomons (along Earth's surface) can be adjusted. The length of the shadow is given, and this length can be used to determine the angle between the gnomon lines and from that the circumference (and diameter, radius, etc) of Earth. Earth can be hidden to give a better view of the relevant geometry. Eratosthenes model is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_astronomy_Eratosthenes.jar file will run the program if Java is installed. You can modify this simulation if you have EJS installed by right-clicking within the plot and selecting "Open EJS Model" from the pop-up menu item.Todd TimberlakeHistory, Law, PoliticsMathematicsComputing and InformationGeosciencePhysicsSpace ScienceEducation2015-04-08T18:13:31.106312Course Related MaterialsQM Measurement Package
https://www.oercommons.org/courses/qm-measurement-package
The QM Measurement Launcher package is a self-contained file for the teaching of the measurement (E, x, and p) of energy eigenstates and their superpositions in quantum mechanics. The file contains ready-to-run OSP programs and a curricular materials. One can choose from several pre-set states to perform measurements on: energy eigenstates, two-state superpositions, and wave packets. The QM Measurement package includes two supplemental documents (see below) that contain curricular worksheets in support of the package. The QM Measurement package is an Open Source Physics curricular package written for the teaching of quantum mechanics. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the osp_superposition.jar file will run the package if Java is installed. Other quantum mechanics packages are also available. They can be found by searching ComPADRE for Open Source Physics, OSP, or Quantum Mechanics.Mario BelloniWolfgang ChristianMathematicsChemistryEngineeringPhysics2015-04-08T18:12:00.252933Course Related MaterialsIs It Possible: Estimating Measurement
https://www.oercommons.org/courses/is-it-possible-estimating-measurement
In this activity, learners will decide together on a question about how far, long or high the group could reach together. For younger learners, choose something a few learners can easily test out: If we joined hands, could we circle the tree? For a medium level of challenge, pick something the whole group can test out: If we lie head to foot, could we reach across the playground? Older learners investigate by estimating: If we stood on one anotheräóťs shoulders, could we reach the top of the building? Learners make predictions based on mental calculations and estimates of size; then, if possible, they try it out. Available as a web page or downloadable pdf.NSFTERCMathematicsLife SciencePhysicsSocial SciencesEducation2015-03-31T17:49:11.834650Course Related MaterialsHeight Museum: How Tall Are You?
https://www.oercommons.org/courses/height-museum-how-tall-are-you
In this activity, learners will measure and make paper strips according to their heights, and arrange the strips in order by length. Is the tallest in the group the oldest? How many of the learners are about the same height? Will the tallest learner in the group will still be tallest in 3 months? In 6 months? Learners explore these questions by making a concrete representation of their heights. Everyone makes a paper strip to show their height, decorates their strips, and then as a group, puts the strips in order. In the process, they practice measuring, comparing lengths, and ordering by length. Available as a web page or downloadable pdf.NSFTERCMathematicsLife SciencePhysicsSocial SciencesEducation2015-03-31T17:49:08.077816Course Related MaterialsFive Second Dash
https://www.oercommons.org/courses/five-second-dash
This is an activity about prediction. How far can you hop in 5 seconds? Could you make it to the door? Across the room? Everyone lines up and tries it. As learners do this activity, they gain meaning for seconds by connecting them to movement: how far they can hop, jump, run, or crawl in that time. They also consider relationships among distance, time, and speed: if I can hop halfway across the room in 5 seconds, could I make it all the way across in 5 seconds if I run? Available as a web page and downloadable pdf.NSFTERCMathematicsLife SciencePhysicsSocial SciencesEducation2015-03-31T17:49:06.073763Course Related MaterialsGrowing Plants: Track Their Growth
https://www.oercommons.org/courses/growing-plants-track-their-growth
In this activity, learners will be working with predictions with a time frame of one week, or longer. Start by planting seedlings. Once they begin to sprout, make predictions: How tall will the plants be in a week? in a month? Each week, learners measure and record the height of their plants. They explore change over time as they compare predictions and results, and as they analyze whether their plants grew about the same amount each week. Available as a web page and downloadable pdf.NSFTERCMathematicsLife SciencePhysicsEducation2015-03-31T17:49:03.927388Course Related MaterialsMeasuring Noise Pollution
https://www.oercommons.org/courses/measuring-noise-pollution
Through investigating the nature, sources and level of noise produced in their environment, students are introduced to the concept of noise pollution. They learn about the undesirable and disturbing effects of noise and the resulting consequences on people's health, as well as on the health of the environment. They use a sound level meter that consists of a sound sensor attached to the LEGO® NXT Intelligent Brick to record the noise level emitted by various sources. They are introduced to engineering concepts such as sensors, decibel (dB) measurements, and sound pressure used to measure the noise level. Students are introduced to impairments resulting from noise exposure such as speech interference, hearing loss, sleep disruption and reduced productivity. They identify potential noise pollution sources, and based on recorded data, they classify these sources into levels of annoyance. Students also explore the technologies designed by engineers to protect against the harmful effects of noise pollution.AMPS GK-12 Program,Jerib Carson and Qianqian Lin at the Madiba Prep Middle SchoolTeachEngineering.orgViolet MwaffoMathematicsEcologyEngineeringForestry and AgricultureGeoscienceLife SciencePhysicsTechnology2015-03-11T17:09:18.701420Course Related MaterialsTiming a Speedbot!
https://www.oercommons.org/courses/timing-a-speedbot
Students strengthen their communicate skills about measurements by learning the meaning of base units and derived units, including speed—one of the most common derived units (distance/time). Working in groups, students measure the time for LEGO® MINDSTORMS® NXT robots to move a certain distance. The robots are started and stopped via touch sensors and programmed to display the distance traveled. Using their collected data, students complete a worksheet to calculate the robots' (mean/average) speeds at given motor powers.AMPS GK-12 Program,Sam Sangankar, James CoxTeachEngineering.orgMathematicsEngineeringPhysicsTechnology2015-03-11T17:08:35.682117Course Related MaterialsLatex Tubing and Hybrid Vehicles
https://www.oercommons.org/courses/latex-tubing-and-hybrid-vehicles
The learning of linear functions is pervasive in most algebra classrooms. Linear functions are vital in laying the foundation for understanding the concept of modeling. This unit gives students the opportunity to make use of linear models in order to make predictions based on real-world data, and see how engineers address incredible and important design challenges through the use of linear modeling. Student groups act as engineering teams by conducting experiments to collect data and model the relationship between the wall thickness of the latex tubes and their corresponding strength under pressure (to the point of explosion). Students learn to graph variables with linear relationships and use collected data from their designed experiment to make important decisions regarding the feasibility of hydraulic systems in hybrid vehicles and the necessary tube size to make it viable.Erik Bowen, Carleigh SamsonTeachEngineering.orgVU Bioengineering RET Program,MathematicsEngineeringPhysics2015-03-11T16:52:45.548992Course Related MaterialsMass Spectrometry
https://www.oercommons.org/courses/mass-spectrometry
Doctor Thomas Nuhse explains that mass spectrometry is a technique for measuring the mass of molecules, which therefore allows researchers to identify molecules.Amy Nisselle REVCaren Gough TITLEDanielle Sixsmith NOTE;ENCODING=QUOTED-PRINTABLEDavid Micklos (Cold Spring Harbor Laboratory;DNA Learning Center X-AUDIENCE)John Connolly (Cold Spring Harbor Laboratory;DNA Learning Center X-AUDIENCE)Laura Maitland (Mepham High School TITLE)Mary Colvard TITLEMathematicsChemistryLife SciencePhysics2014-11-20T10:32:31.502225Course Related MaterialsBuilding A Scale Model
https://www.oercommons.org/courses/building-a-scale-model
Students create models of objects of their choice, teaching them skills and giving them practice in techniques used by professionals. They use sketches as they build their objects. This activity facilitates a discussion on models and their usefulness.Center for Engineering Educational Outreach,Center for Engineering Educational Outreach, Tufts UniversityTeachEngineering.orgMathematicsEngineeringEducation2014-11-07T13:18:25.742693Course Related Materials