Keywords: Dispersal (8)

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Cells and Walls
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Cells and Walls

Using toothpicks, straws, or tubes of rolled up newspaper, learners create 3-dimensional ... (more)

Using toothpicks, straws, or tubes of rolled up newspaper, learners create 3-dimensional models to illustrate the basic structure and function of the cell membrane, and place an object inside to represent the cell nucleus. This activity can be used in conjunction with the Observing Cells and Single-Cell Life activities from the same source. This activity can be found on pages 20-21 of the activity guide. (less)

Subject:
History, Law, Politics
Mathematics
Chemistry
Computing and Information
Ecology
Engineering
Forestry and Agriculture
Geoscience
Life Science
Physics
Space Science
Technology
Social Sciences
Education
Material Type:
Activities and Labs
Data
Games
Instructional Material
Lesson Plans
Simulations
Provider:
Science and Math Informal Learning Educators (SMILE)
Provider Set:
SMILE Pathway: Science and Math Activities in One Search
Author:
NASA
National Science Foundation
TERC
Darwin's Letters: Collecting Evidence
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Darwin's Letters: Collecting Evidence

This group of letters is a sample of the extensive correspondence Darwin ... (more)

This group of letters is a sample of the extensive correspondence Darwin carried on with a wide group of friends and colleagues as he collected evidence to support his theory of evolution by natural selection. From Charles Darwin's Letters: A Selection 1825-1859. ***Access to Teacher's Domain content now requires free login to PBS Learning Media. (less)

Subject:
Science and Technology
Life Science
Material Type:
Readings
Provider:
PBS LearningMedia
PBS Learning Media
Provider Set:
PBS Learning Media: Multimedia Resources for the Classroom and Professional Development
Teachers' Domain
Author:
National Science Foundation
WGBH Educational Foundation
Designer Seeds
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Designer Seeds

In this activity students examine a variety of seeds, describe them, and ... (more)

In this activity students examine a variety of seeds, describe them, and determine how they are dispersed. Students investigate seed dispersal mechanisms. Students, working in pairs, create and test a wind dispersed seed that they have designed themselves. Students are limited to using a single piece of white paper, one lima bean to represent a seed, tape and scissors. Seeds are tested by dropping them in front of a window fan and recording the distance they travel. Repeat trials are conducted, averages calculated, and class data recorded. Students examine the features of successful seeds and redesign their seed to try to increase the distance it can be carried by wind. Results are analyzed and comparisons made to natural phenomena. (less)

Subject:
History, Law, Politics
Mathematics
Ecology
Engineering
Forestry and Agriculture
Geoscience
Life Science
Technology
Social Sciences
Education
Material Type:
Activities and Labs
Instructional Material
Lesson Plans
Teaching and Learning Strategies
Provider:
BiosciEdNet (BEN): Digital Library Portal for Teaching and Learning in the Biological Sciences
National Health Museum
Science and Math Informal Learning Educators (SMILE)
Provider Set:
BiosciEdNet (BEN): Digital Library Portal for Teaching and Learning in the Biological Sciences
Access Excellence @ The National Health Museum: The Site for Health and Bioscience Teachers and Learners
SMILE Pathway: Science and Math Activities in One Search
Author:
Access Excellence @ the National Health Museum REV
Frank Taylor
Frank Taylor (Radford High School REV)
National Health Museum
Permissions Manager (Access Excellence @ the National Health Museum REV)
Marine Reserve Design: Simulating stakeholder options
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Marine Reserve Design: Simulating stakeholder options

Students are provided with information about a hypothetical island state, named Udubia, ... (more)

Students are provided with information about a hypothetical island state, named Udubia, including a detailed map with infrastructure, bathymetry, currents, and a standardized grid. Data on fisheries, biodiversity, and marine mammal and endangered species populations are also provided, and are referenced to the map퉌Ís grid. A table (natural_history.doc) that summarizes the natural history of the species is also provided and can either be provided to the students or kept for instructor reference. Each student will choose a character representing a stakeholder in the placement and design of the marine reserve. Groups of stakeholders propose marine reserves and debate the proposals. (less)

Subject:
Ecology
Forestry and Agriculture
Geoscience
Life Science
Material Type:
Instructional Material
Readings
Provider:
BiosciEdNet (BEN): Digital Library Portal for Teaching and Learning in the Biological Sciences
Provider Set:
BiosciEdNet (BEN): Digital Library Portal for Teaching and Learning in the Biological Sciences
Author:
Peter A Selkin
Potential Impacts of Climate Change on the Distribution of North American Trees
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Potential Impacts of Climate Change on the Distribution of North American Trees

This peer-reviewed article from the December 2007 issue of BioScience presents two ... (more)

This peer-reviewed article from the December 2007 issue of BioScience presents two scenarios of tree distribution changes as a result of predicted climate change.Currently predicted change in climate could strongly affect plant distributions during the next century. Here we determine the present-day climatic niches for 130 North American tree species. We then locate the climatic conditions of these niches on maps of predicted future climate, indicating where each species could potentially occur by the end of the century. A major unknown in this work is the extent to which populations of trees will actually track climate shifts through migration. We therefore present two extreme scenarios in which species either move entirely into future climatic niches or do not move out of their current niches. In the full-dispersal scenario, future potential ranges show decreases and increases in size, with an average decrease of 12% and a northward shift of 700 kilometers (km). In the no-dispersal scenario, potential ranges decrease in size by 58% and shift northward by 330 km. Major redistribution pressures appear to be in order under both dispersal scenarios. (less)

Subject:
Mathematics
Geoscience
Material Type:
Reference
Provider:
BiosciEdNet (BEN): Digital Library Portal for Teaching and Learning in the Biological Sciences
Provider Set:
BiosciEdNet (BEN): Digital Library Portal for Teaching and Learning in the Biological Sciences
Author:
Daniel McKenney (Canadian Forest Service ;Landscape Analysis and Applications Section)
John Pedlar (Canadian Forest Service ;Landscape Analysis and Applications Section)
Kathy Campbell (Canadian Forest Service ;Landscape Analysis and Applications Section)
Kevin Lawrence (Canadian Forest Service ;Landscape Analysis and Applications Section)
Michael Hutchinson (Australian National University;Fenner School of Environment and Society)
Seed Adaptations
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Seed Adaptations

By participating in a seed scavenger hunt, learners examine many adaptations of ... (more)

By participating in a seed scavenger hunt, learners examine many adaptations of seeds, including how many seeds a plant makes, how those seeds travel to new locations, and what protects them from predators and weather. Learners consider why dispersal or spread of seeds is important to the survival of plant species as they identify seeds that fly, seeds that float on air, seeds that cling to other things that move, and more. This activity can be done in conjunction with the Local Field Guide activity from the same source, and is great for an outdoor field trip. This activity can be found on pages 26-27 of the activity guide. (less)

Subject:
Science and Technology
Material Type:
Activities and Labs
Provider:
TERC
Provider Set:
Mixing in Math
Seed Dispersal
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Seed Dispersal

In this outdoor activity and bingo-like game, learners explore why and how ... (more)

In this outdoor activity and bingo-like game, learners explore why and how seeds spread far from the plants that produce them. To understand natural adaptions that let seeds and fruit be dispersed, learners make modifications to dried beans and peas so they could be dispersed by natural forces like water, air, or an animal moving from one place to another. In the "Seed-Go" Game, learners match ways that seeds are dispersed, to fill rows on the game board. (less)

Subject:
Science and Technology
Ecology
Engineering
Forestry and Agriculture
Geoscience
Life Science
Physics
Social Sciences
Material Type:
Activities and Labs
Games
Instructional Material
Provider:
Regents of the University of California
Science and Math Informal Learning Educators (SMILE)
Provider Set:
SMILE Pathway
SMILE Pathway: Science and Math Activities in One Search
Author:
Lawrence Hall of Science
Using Stream Leaf Packs to Explore Community Assembly
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Using Stream Leaf Packs to Explore Community Assembly

In this TIEE experiment, students will explore functional and taxonomic diversity in ... (more)

In this TIEE experiment, students will explore functional and taxonomic diversity in a stream ecosystem, learn about food web relationships, and learn about the ways in which abiotic and biotic factors determine what organisms are present in a community. Students will make and install artificial leaf packs in a stream, wait for the leaf packs to be colonized by stream organisms, measure abiotic variables that could influence leaf pack colonization, retrieve the leaf packs and classify the organisms they find in both taxonomic and functional ways, and participate in a class discussion of how the leaf pack community is situated within a larger ecosystem. (less)

Subject:
Geoscience
Life Science
Education
Material Type:
Instructional Material
Readings
Provider:
BiosciEdNet (BEN): Digital Library Portal for Teaching and Learning in the Biological Sciences
Provider Set:
BiosciEdNet (BEN): Digital Library Portal for Teaching and Learning in the Biological Sciences
Author:
Laurel Hartley
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