Pitfalls of Metaphors: Does Warm Air Hold More Water?


Posted: Jan 15 2015 by Glenn Dolphin & Kim Kastens
Topics: Perception/Observation, Metacognition, Interpretation/Inference

Preface

The following is a guest post by Glenn Dolphin (aka "Flipper"), of the University of Calgary Department of Geosciences.

This discussion first appeared in the ESPRIT list server, a lively forum for discussion of earth science teaching, mostly at the secondary school level. When Flipper's ideas below came forth, there had been an extensive multi-person, multi-day discussion of whether it was useful or misleading to tell students, during their study of weather and climate, that "warm air holds more water vapor than cold air." Although this and synonymous statements are common in popular science treatments (for example, here and here), this form of explanation has been roundly criticized in other expositions for the public (for example, here and here).

A point of view held by several teachers could be summarized by one who wrote: "As I see it, declaring that air 'holds' water isn't nearly as awful as it's made out to be." I was reminded of my blog post and followup comments about Telling Lies to Children, asking where is the borderline between a pedagogically valuable simplification and a lie. Air "holding" water is not literally true; it is a metaphor in which air is compared to a container with a limited holding capacity. Metaphors can be valuable tools for helping the human mind come to grips with (another metaphor) an unfamiliar concept. But they also have pitfalls, as explored in the guest post below.

—–Kim Kastens–Earth & Mind co-editor

Guest blog post

In my research, I am looking at the metaphors we (experts, for the most part) use in science and their effect on how students (novices) understand them. We use many metaphors (selfish gene, black hole, big bang, electron cloud, tectonic plate). As experts, we may very well be able to use "hold" if we have a good physical understanding for the air/water system. However, people who don't, like our novice students, will generate meaning based on their own physical experiences of containers that hold things. This could then lead to difficulties in understanding, most likely because they will always start from this point, and not give other meanings a chance. More

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A Curriculum by Design Part II: Student Learning Outcomes and Program Assessment


Posted: Jan 20 2014 by David Mogk, Dept. Earth Sciences, Montana State University

In an earlier blogpost (A Curriculum by Design) I outlined the philosophy and process we used in the Department of Earth Sciences, Montana State University, to revise our undergraduate curriculum. This continuing contribution describes the process we used to identify student learning outcomes (SLOs) across the curriculum, and how these SLOs have been used to develop our department assessment plan (required in anticipation of our forthcoming institutional accreditation review).

Assessment

Assessment is collecting data with a purpose. The Department of Earth Sciences completed an extensive review of student learning outcomes at the programmatic level for all courses offered by the department. Our assessment plan is designed to: a) provide faculty with an opportunity to reflect on course goals, methods and expected student learning outcomes, b) aggregate these course learning goals into an overall departmental matrix of student learning outcomes, c) provide formative feedback to improve teaching and learning in Earth Sciences courses, and d) for accountability, to demonstrate that the departmental and institutional vision and mission are being addressed and that the curriculum is consistent with contemporary professional standards in the geosciences. The resulting SLO Matrix (Excel 2007 (.xlsx) 122kB Jan16 14) provides a rapid, visual map of the "landscape" of our curriculum; you can readily see areas of emphasis, and areas that might need more attention in our curricular development. This exercise also provided our faculty the opportunity to reflect deeply on the concepts and skills they emphasize in their own courses, gave them some incentives to revise courses to respond to the SLO goals, and opened the door for more extensive curricular discussions between faculty (who generally were not aware of content/skills being taught in courses related to their own). More

Educating for "Sapience"


Posted: Sep 8 2013 by Kim Kastens
Topics: Evolution, Community, Solving Societal Problems, Metacognition, Systems Thinking

I've recently been digging into the writings of George Mobus on the subject of "Sapience." Mobus begins by asking himself and his readers "If we are such a clever species, why is the world the way it is, and heading in such a bad direction?"

His answer is that most humans, even very intelligent and clever ones, have too little "sapience."

"Sapience" is Mobus' term for a human attribute that is a combination of judgement (based on life experiences), moral sense (primarily altruism, thinking about the welfare of the group as well as of yourself), taking a long view of the future (strategic perspective), and systems perspective. He thinks that sapience is present in all humans, but very unevenly distributed with a few people having a lot and most people having little. More

What precursor understandings underlie the ability to make meaning from data?


Posted: Jun 6 2013 by Kim Kastens
Topics: Temporal Thinking, Research Idea, Interpretation/Inference, Metacognition

I've been thinking a lot recently about how scientists and students make meaning from data, spurred in part by the Earth Cube education end-users workshop. Among other things, I've been trying to understand what kinds of deeply foundational understandings might be constructed by young children through unstructured observation using the human senses, and then later re-purposed as they begin to work with data.

Here is one candidate: Future data users need to understand that:

  • events in the world leave traces, and
  • by looking the traces, we can make inferences about the events.
  • More

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Curriculum by Design


Posted: Mar 20 2013 by David Mogk, Dept. Earth Sciences, Montana State University

The Department of Earth Sciences, Montana State University, recently implemented a top to bottom revision of its curriculum. We are a department that encompasses both geology and geography, and we have degree options in Geology, Geography (physical and human), GIS/Geographic Planning, Hydrology (currently on hold pending appointment of a new faculty line), Snow Science, and Paleontology. These latter two degree options are somewhat unique in the US for undergraduate degree programs, and have been hugely successful in recruiting students to the geosciences, particularly out of state students. We currently have a faculty of 11, about 270 majors, 60 graduate students (40 MS and 20 PhD), and provide a large instructional service to MSU, particularly for students from Education, Ecology, Land Resources, and the social sciences.

Our curricular changes were necessitated by both philosophical and practical considerations. Philosophically we were guided by a number of principles: More

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