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Results 21 - 30 of 1123 matches
M & M Decay part of Cutting Edge:Rates and Time:Teaching Activities
This is a simulation of radioactive decay which illustrates what a half-life is and explains some of the challenges involved with radiometric dating. Pennies or other cheap coins can be substituted for M&Ms if ...
Determining Earthquake Recurrence Intervals from Trench Logs part of Rates and Time:GSA Activity Posters
Trench logs of the San Andreas Fault at Pallett Creek, CA are the data base for a lab or homework assignment that teaches about relative dating, radiometric dating, fault recurrence intervals and the reasons for uncertainty in predicting geologic phenomena. Students are given a trench log that includes several fault strands and dated stratigraphic horizons. They estimate the times of faulting based on bracketing ages of faulted and unfaulted strata. They compile a table with the faulting events from the trench log and additional events recognized in nearby trenches, then calculate maximum, minimum and average earthquake recurrence intervals for the San Andreas Fault in this area. They conclude by making their own prediction for the timing of the next earthquake.
Roping Geologic Time part of Rates and Time:GSA Activity Posters
After having talked about the geologic time scale, I ask for two volunteers from the class to hold a rope that is 50 feet long. I say that one end is the beginning of the Earth (4.6 billion years ago), and the other is today. I then give out 16 clothes pins and ask various students to put a cloths pin on the 'time line' at various 'geologic events'. Throughout the activity I have a quiz going on where the students calculate percentages of Earth History for major geologic events, and compare it to their own ages. On their time scale, the dinosaurs died only about two 'months' ago! The exercise is very effective at letting them get a sense of how long geologic time is, and how 'recently' some major geologic events happened when you consider a time scale that is the age of the earth.
The Evolution of Earth through Time part of Cutting Edge:Rates and Time:Teaching Activities
This activity is designed for large freshman courses (>200 students) and is used in-class. The activity requires a short (15 minute) overview of Earth history before students have the opportunity to work through ...
Hierarchical Alignment of Timelines part of Cutting Edge:Rates and Time:Teaching Activities
In the hierarchical alignment activity students progressively and hierarchically align scale information to a spatial linear representation. The progressive alignment of scales may alleviate the conceptual ...
How Many Is A Million? part of Cutting Edge:Rates and Time:Visualizations with Teaching Notes
Roger Steinberg, Department of Natural Sciences, Del Mar College Description To help students visualize the immensity of geologic time, or even the immensity of just one million years, I have created a very large ...
Depositional Environments and Geologic History Labs part of Cutting Edge:Rates and Time:Teaching Activities
This is a pair of labs that incrementally prepare students to interpret the geologic history of a rock sequence. The first lab introduces students to depositional environments and fossils. The second lab presents a ...
Building Blocks part of Cutting Edge:Environmental Geology:Activities
In association with rock and mineral ID tables, this lab introduces students to basic rocks and minerals via grouping and comparison, rather than as individual samples. I use this lab in my environmental geology ...
Global Earthquakes: Teaching about Earthquakes with Data and 3D Visualizations part of Cutting Edge:Visualization:Examples
In this series of visualizations and accompanying activities, students visualize the distribution and magnitude of earthquakes and explore their distribution at plate boundaries. Earthquakes are visualized on a 3D ...
Visualizing Global Earthquakes Where and Why do Earthquakes Occur? part of Cutting Edge:Visualization:Examples
In this activity students visualize the distribution and magnitude of earthquakes at and below the surface of Earth and how their distribution is related to plate boundaries. Earthquakes are visualized on a 3D ...