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| Our Changing Earth Explorations with Susan
Holmes
Keystone teachers of grades 4-8 investigated aspects of our constantly changing Earth. After exploring rocks for the evidence each can divulge about how it formed, where it has been since it formed, and the forces (weathering) that have been acting on it in the interim, participants wrestled with the complexities of interacting with earth processes, landforms, and large-scale change. |
| Along with the other groups, Pat, Diane, and Rod combine their ideas, brainstorming to fill a concept map about rocks. | |
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Features and characteristics of every rock give clues to their formation—it's interpreting those clues that's the challenge! |
| What began as John's simple displacement measurement turns into a surprise—one of these rocks floats. |  |
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Susan wonders what vinegar will do to these rocks. |
| Susie weighs the samples. Perhaps density will reveal something. |  |
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A chunk of Hawaiian pahoehoe (lava) spurs connections and new questions about rock formation. |
| Susan challenges the groups to change the plaster "rocks" using these instruments of destruction. |  |
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Rod and Diane negotiate the fate of their team's plaster rocks. |
| Marie and her group wonder how intense heat will affect the rock. |  |
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Rosalind, Audrey, and Susan smash a sample with glee, and then brainstorm the many ways that same action happens in nature (without a hammer!). |
| The Franklin Institute gratefully acknowledges the generous support of the National Science Foundation and Unisys Corporation. | |||
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The Franklin Institute is the Demonstration Site for the
Eisenhower
Mid-Atlantic Consortium, providing science and math
resources for teachers.
This material is based upon work supported by the National Science Foundation under Grant No. 9819641. © 2003. All rights reserved.
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