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Capturing Monarch Metamorphosis in Logger Pro
Ben Carter, a 12-year-old from Nashville, TN, captured a beautiful time-lapse video of a monarch caterpillar pupating into a chrysalis using Logger Pro and a ProScope HR camera.
Continue reading about Capturing Monarch Metamorphosis in Logger Pro…
Hot House
Clarence Bakken, a retired physics teacher from California, explored insulating capabilities of different wall materials. Clarence used an Infrared Thermometer to study the rate at which heat is transferred through the walls in a model house.
How Do You Dim an LED?
Have you ever seen an LED-based headlamp that has selectable brightness? Sometimes the brightness change is from turning on more or fewer LEDs, but sometimes the individual LEDs seem to change brightness. How does this work? Usually when you reduce the voltage across an LED, it just goes out. We looked into this question using a Vernier Light Sensor and a LabQuest.
Creative Classroom Solutions
Peter O’Connor, a teacher from Boonsboro High School in Maryland, described a situation facing many teachers—lots of students and only a few computers.
“Having used Logger Pro for many years dating back to the ULI days, my school has been happy using it in our labs. However, as class size increased, we have had issues with maintaining a small lab group size for each lab. This is a large issue when it comes to doing Vernier labs with computers.”
Spectrophotometric Analysis of the Metals in a U.S. Five-Cent Coin
Vernier consultant, Walter Rohr, came across an article published in the February 1989 Journal of Chem Ed that described a method of resolving mixtures with overlapping spectra without determining molar absorptivities or complicated mathematics. The method developed by Blanco called Multi-Wavelength Linear Regression Analysis, or MLRA, allows the composition of a binary mixture with overlapping spectra to be resolved with only three measurements—the absorbance of a standard solution for each component, and the unknown mixture itself.
Continue reading about Spectrophotometric Analysis of the Metals in a U.S. Five-Cent Coin…
Creating a Topographic Map with Motion Detectors
Brillion Middle School teachers Ryan Peterson and Matt Van Thiel have their 8th grade Earth Science students do a fun and engaging activity on topographic mapping. The activity is based on the Earth Science with Vernier activity “Ocean Floor Mapping.” Using plastic utility tarps, they create a simulated lake in their classroom.
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Natural Bridge Caverns
Vernier recently attended the GLOBE annual conference in San Antonio, TX, where we sponsored a field trip to Natural Bridge Caverns, a limestone cave. Sixty teachers made their way through the wet, drippy tour of the caverns and collected relative humidity, temperature, and barometric pressure data along the way.
What a Drag!
A customer called recently looking for ideas on aerodynamic drag experiments. This inspired us to do a little research with toy cars on the roof of a car.
Heat Conduction
Bernard Zalewski from Marianist Province USA sent us some information on how he uses our Go!Temp to do experiments on thermal conductivity. He uses several different metals.
Investigating an Acid Mixture
An interesting and challenging problem for AP Chemistry students is the investigation of a mixture. We have a great chemistry experiment available in which the student analyzes a mixture of hydrochloric acid and phosphoric acid. This lab presents the student with the task of conducting a seemingly routine acid-base titration.