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Crystal Demonstration for Second-Graders

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On February 4, Jason Greenwood and Dennis Krohn (St. Petersburg, FL) presented a demonstration on crystals for students in the Gifted Program at McMullen-Booth Elementary School in Clearwater, FL. The second-grade class was studying how to grow crystals in space. The children examined several common minerals, such as table salt and calcite. The cubic form of halite that appeared under the microscopes fascinated them. Most of them were amazed to learn that such beautiful, well-formed crystals could grow naturally. The most popular crystal was a large optical-grade calcite rhombohedron.

crystals in bowl
Home-grown crystals: Crystals grown in a bowl by the students. The crystals formed at room temperature from various solutions of nontoxic mineral salts and dyes.
  Jason Greenwood displays amethyst crystals
Natural crystals: Jason Greenwood shows children a large rock encrusted with amethyst crystals.

Jason showed his wonderful collection of minerals, and his training with the hard rocks in Idaho really helped with the nonstop questions the kids asked. The children were highly advanced for second grade. After class, Jason and Dennis helped the teachers identify the crystals the class had grown.

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in this issue: Fieldwork cover story:
African Sahel Dust

Outreach Aleutians Documentary

Radio Interview Explores African Dust

Florida Coastal Storm Defenses

Crystal Demonstration

Oceans Day 2002

Home-Schooled Tour

Black History Month

Environmental Academy Web Site

Regional Science Fair

Meetings Fishing Symposium

Congressional Briefing—Sea Otter Research

Contracting Meeting

Lake Mead

SEABED Technology

Law of the Sea

Awards Recycling Program

Staff & Center News Bill Dillon Retires

John Hughes Clarke—"Imaging Water Mass Variability"

Deltas Seminar

Publications March Publications List

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