Western Mining History presents a short history of a dredging unit from central Idaho used during the Gold Rush. The dredge was a mining technology brought into use after 1890. Western Mining History is an historical site that provides databases, information on mining, mining towns, gold and Photos and maps of the western United States. Consider becoming a member or making a donation to help further the work of the site. Visit the dredge site here: http://yankeeforkdredge.com/

This activity engages learners in exploring the impact of climate change on arctic sea ice in the Bering Sea. They graph and analyze sea ice extent data, conduct a lab on thermal expansion of water, and then observe how a scientist collects long-term data on a bird population.

Students teams use a laparoscopic surgical trainer to perform simple laparoscopic surgery tasks (dissections, sutures) using laparoscopic tools. Just like in the operating room, where the purpose is to perform surgery carefully and quickly to minimize patient trauma, students' surgery time and mistakes are observed and recorded to quantify their performances. They learn about the engineering component of surgery.

Students are presented with a graph of atmospheric becomes CO² values from Mauna Loa Observatory, and are asked to explore the data by creating a trend line using the linear equation, and then use the equation to predict future becomes CO² levels. Students are asked to describe qualitatively what they have determined mathematically, and suggest reasons for the patterns they observe in the data. A clue to the reason for the data patterning can be deduced by students by following up this activity with the resource, Seasonal Vegetation Changes. The data graph and a student worksheet is included with this activity. This is an activity from Space Update, a collection of resources and activities provided to teach about Earth and space. Summary background information, data and images supporting the activity are available on the Earth Update data site.

Students run a simplified computer model to explore how climate conditions can affect caribou, the most abundant grazing animal in the Arctic.

In this assignment students receive six air photos of a 4 km stretch of Fountain Creek in El Paso Country, Colorado (38.7 N, 104.715 W) taken between 1989 and 2006 and are asked to evaluate and discuss how Fountain Creek has changed through the years. The main nuts and bolts of the assignment are an analysis of these repeat air photos and production of a map that depicts how the course of the river (or its cut-banks, point bars and bank-to-bank width) changes through time. To make this map, students can use trace paper/Mylar, or software such as ArcGIS or Adobe Photoshop or Illustrator, but whatever their method they use they need to be able to establish a scale allowing them to measure and calculate rates of change. What change to quantify is purposely left open ended - students typically focus on measuring rates of cut-bank erosion, point bar migration, bank-to-bank width changes, channel length or sinuosity variation over the prescribed study area - and is usually linked directly to what they decide to map, such as the course of the river or the extent of the 'active' channel. After producing their map and making measurements, the final part of the assignment is synthesis. In the final questions, students are asked to summarize and describe in words what's happening to the channel through time, with reference to their map and calculations, and to consider the environmental conditions that are driving the changes observed.

(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 animation illustrates how the hardiness zones for plants have changed between 1990 and 2006 based data from 5,000 National Climatic Data Center cooperative stations across the continental United States.

In this activity, students research changes to the environment in the Arctic/Bering Sea over time using oral and photographic histories. Developed for Alaska Native students, this activity can be customized for other regions.

This activity will include the students observing the monarch life cycle inside the classroom, a field experience observing monarch life on a milkweed plant and drawing it, and back in the classroom students will make a pop-up book of the monarch's life cycle with a short description on each page.

This video looks at the impact of changing climate on animal habitats around the world, showing how different creatures are responding to changing temperatures and precipitation patterns.

This video addresses the impact of climate change on several butterfly populations. Warming temperatures lead to shifts in location of populations of butterflies or die-offs of populations unable to adapt to changing conditions or shift to new locations.

This video provides a comprehensive introduction to the role of coral reefs, the physiology of corals, and the impacts of ocean warming and acidification on coral survival. It highlights experts from the Bermuda Institute of Ocean Sciences and the University of Miami.

This video illustrates conditions under which two infectious diseases - cholera and dengue fever - flourish, and how climate change is likely to exacerbate those conditions. Note: you may need to scroll down the Changing Planet video page to get to this video.

This video addresses acidification of the ocean and the ecological and economic implications of the resulting pH change on marine life. It includes information about how ocean acidification resulting from increased absorption of CO2 from the atmosphere is affecting ocean species such as sea urchins and oysters. Scientists from the University of California at Santa Barbara discuss their experiments with sea creatures in acidic sea water. There is an associated lesson plan and classroom activity that has students test the effects of CO2 on water pH.

The video addresses impact of warming temperatures on major lakes of the world with specific focus on Lake Superior and Lake Tanganyika. It discusses the science of water stratification and its impact on lake ecosystems and on human populations whose livelihoods depend on the lakes.

This lesson plan is written around a brief role-play in which students learn about and act out plants and animals in a salt marsh habitat as the tides change.

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Spreadsheets Across the Curriculum module. Students build spreadsheets to explore conditions that lead to chaotic behavior in logistic models of populations that grow discretely.

Character coding has been called the bete noire of phylogenetic analysis. As you may have seen from class, the definition of "character" is squishy and varies between authors. Although there isn't agreement on exactly what a character is, it is possible to predict how certain character definitions and coding strategies affect phylogenetic analysis.
This activity focuses on character coding, specifically about how different coding strategies can affect analysis. In this exercise we will try to look at different coding strategies by considering the simple shapes below.

(1) What is a character, and what qualities do characters have?
(2) Given the 'morphology' depicted above, what features vary?
(3) Given the variation you identified, come up with as many character codings as you can; i.e., different ways that this variation can be coded into characters.
(4) For each of the coding strategies you come up with in question 3, identify its assumptions, limitations, and strengths.
(5) Identify your preferred coding strategy and defend your choice.

Students asked to define what a character is and to discuss what they 'require', and then to come up with an exhaustive list of coding strategies for the sample morphology. They are then asked to list assumptions/limitations of each strategy.

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To prepare for this exercise students read about the processes that operate at plate boundaries and how they are related to the distinct patterns of seismicity, volcanism, surface elevations (e.g., ridges versus trenches), and seafloor ages characteristic of different boundary types. During the week the assignment is available online, students have access to:
(1) an index map that locates three boundaries they are to study; and
(2) four maps from Sawyer's Discovering Plate Boundaries website that provide the data mentioned above.��

Student tasks are to:��
(1) document patterns in each type of data along the three targeted boundaries; and��
(2) use these observations in conjunction with their understandings of the processes that operate along different types of boundaries to decide whether each of the targeted sites is most likely to be a divergent, convergent, or shear boundary.��

This activity gives students practice in map reading, interpreting the likely tectonic setting of a boundary by pulling together constraints from several types of data, and collaborating with their classmates in an online environment. The activity also provides a foundation for understanding a wide range of phenomena that are discussed later in the semester in the context of plate tectonic processes.
Modifications on this activity from the community

Show More
Show LessContributed by Tom Hickson
I also use a version of Dale Sawyer's Discovering Plate Boundaries exercise in an online course. I used the basic idea of this activity and moved in onto Canvas, our LMS. Here is my adaptation of the activity, with maps and examples, illustrating how I have implemented it:

Description of the assignment: Student handout, ONLINE_ Characterizing Plate Boundaries (adapted).pdf (Acrobat (PDF) 166kB Feb19 21)
Answer sheet for students to record observations and interpretations: Target Boundaries: Student answer sheet (Acrobat (PDF) 1MB Feb19 21)
World map with Target Boundaries (Acrobat (PDF) 483kB Feb19 21)

Maps of the "target boundaries" -- my selected areas of focus for the exercise:

Example map, Boundary 3

Provenance: Thomas A. Hickson, University of St. Thomas
Reuse: This item is offered under a Creative Commons Attribution-NonCommercial-ShareAlike license http://creativecommons.org/licenses/by-nc-sa/3.0/ You may reuse this item for non-commercial purposes as long as you provide attribution and offer any derivative works under a similar license.












Example map, Boundary 2

Provenance: Thomas A. Hickson, University of St. Thomas
Reuse: This item is offered under a Creative Commons Attribution-NonCommercial-ShareAlike license http://creativecommons.org/licenses/by-nc-sa/3.0/ You may reuse this item for non-commercial purposes as long as you provide attribution and offer any derivative works under a similar license.












Map example, boundary 1

Provenance: Thomas A. Hickson, University of St. Thomas
Reuse: This item is offered under a Creative Commons Attribution-NonCommercial-ShareAlike license http://creativecommons.org/licenses/by-nc-sa/3.0/ You may reuse this item for non-commercial purposes as long as you provide attribution and offer any derivative works under a similar license.

Teaching Tips
Adaptations that allow this activity to be successful in an online environment
Sawyer's Discovering Plate Boundaries is a jigsaw exercise in which students collaboratively develop an empirical classification of plate boundaries by first studying an individual data set (e.g., seismicity) and then working as part of a multidisciplinary team to develop a composite classification for the boundaries of a single plate using several types of data. In order for the classification to be truly empirical, students are not introduced to the "traditional" classification of plate boundaries till the end of the exercise.��

In adapting this assignment to the online environment I have:

(1) asked students to prepare by becoming familiar with the standard classification of plate boundaries and the processes that operate at them;��
(2) limited their work to three targeted boundaries of different types; and��
(3) provided guidance about which features to look for in the each data set. I have found that these modifications help online students, who often work alone "on their own schedules", to avoid getting "lost" and frustrated with the assignment and to compensate for the lack of collaborative input they would receive in a classroom setting.

Elements of this activity that are most effective
The success of this exercise is really seems to depend on how well a student follows the directions. If a student learns about the geologic differences among plate boundaries, makes careful observations, and thoughtfully compares his or her observations to the expected patterns he or she typically does quite well based on answers to the follow-up questions. If, on the other hand, a student simply looks up the types of the targeted boundaries on a map and then attempts to "back out" the observations that he or she thinks should fit, the result is often inconsistency and a poor score on the questions. (I can often tell which approach a student is taking based on the queries they post to the discussion board, but rarely seem to be able to get those who are trying to work backwards through the assignment to change direction.)
Recommendations for other faculty adapting this activity to their own course:
To date my experience developing an engaging online exercise to help students learn the principles of plate tectonics has only been partly successful. I think that having such an exercise is critical, however, because this topic provides the framework for so much of what we learn in the geosciences. Based on my efforts to adapt elements of Discovering Plate Boundaries to an online environment I would offer three recommendations.

(1) Provide examples. Confronted with an unfamiliar map students are sometimes confused when asked to decide if seafloor age, for example, is uniform or variable along the length of a boundary. Showing them what you mean using snapshots from a map can often clear questions like this up quickly. Similarly, for written work a single example that gives them a clear sense of "what you're looking for" and can often head off a lot of questions.
(2) Choose the boundaries you ask students to study carefully. The scarcity of documented volcanism along a mid-ocean ridge or the burial of seafloor age belts by sediment along a trench can result in student observations that are correct, but problematic for correctly assessing the nature of a boundary.
(3) Stay on top of student questions and comments, and be prepared to make well-publicized "mid-course corrections" if something you thought was clear turns out to be misunderstood. These minor corrections happen naturally in face-to-face classes but can require real diligence to catch and correct in the online environment.

(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.)

Explore the role of charge in interatomic interactions. The forces attracting neutral atoms are called Van der Waals attractions, which can be weak or strong, depending on the atoms involved. Charged atoms (also known as ions) can repel or attract via Coulomb forces, and the forces involved are much stronger. Oppositely charged atoms attract to each other, while similarly charged atoms repel. The attractive forces between atoms have consequences for their interactions in physical, chemical and biological applications.