Activity Number 284

	Overview and Learning Objectives
	Assessment
	Central Concepts
	Textbook References
	Benchmarks and Standards
	Extensions and Connections
	Activity Credits
	Requirements

Introduction to Crystals

Interactive, scaffolded model

Go To Activity

Follow the link above to start or download this activity.

This Activity Requires:

Java 1.5+ - Java 1.5+ is available for Windows, Linux, and Mac OS X 10.4 and greater. If you are using Mac OS X 10.3, you can download MW Version 1.3 and explore within it instead.

Test your system to see if it meets the requirements

Important! If you cannot launch anything from this database, please follow the step-by-step instructions on the software page.

Please Note: Many models are linked to directly from within the database. When an activity employs our scripting language, Pedagogica, as do some of the "guided" activities, the initial download may take several minutes. Subsequent activities will not take a long time. See this page for further instructions.

	Overview and Learning Objectives Crystals are common forms of solids characterized by the order of the molecules. In this activity students explore crystal structure. Students will be able to: describe one possible order of a crystal; understand the van der Waals, ionic charges and electron clouds that hold various types of crystals together; melt and attempt to reform a molecular crystal; describe types of imperfections; predict the effect of defects and grain boundaries on crystal cleavage. return to top



	Assessment Pre-Post Test: http://www.concord.org/~barbara/workbench_web/pdf/Intro_to_crystals_assess4.pdf In MW http://www.concord.org/~barbara/workbench_web/models/jnlps/IntroCrystalsassess1.jnlp Rubric http://www.concord.org/~barbara/workbench_web/pdf/Intro_to_crystals_RUBRIC4.pdf return to top



	Central Concepts Key Concept: Crystals are ordered repetitive arrays of atoms. Additional Related Concepts Physics/Chemistry Crystal Crystallization return to top



	Textbook References Biology (Miller and Levine) Prentice Hall 5th Edition - Unit 1: Chapter 4 - The Chemical Basis of Life return to top



	Benchmarks and Standards AAAS THE PHYSICAL SETTING: THE STRUCTURE OF MATTER - Atoms often join with one another in various combinations in distinct molecules or in repeating three-dimensional crystal patterns (Full Text of Standard) return to top



	Extensions and Connections Closely connected activities in this database include molecular crystals, x-ray crystallography, and piezo electric crystals. return to top



	Activity Credits Created by CC Project: Molecular Workbench using Molecular Workbench return to top



	Requirements Java 1.5+ - Java 1.5+ is available for Windows, Linux, and Mac OS X 10.4 and greater. If you are using Mac OS X 10.3, you can download MW Version 1.3 and explore within it instead. return to top

These materials are based upon work supported by the
National Science Foundation under grant number DUE-0402553

Any opinions, findings, and conclusions
or recommendations expressed in this material are those of
the author(s) and do not necessarily reflect the views
of the National Science Foundation.

Introduction to Crystals

Overview and Learning Objectives

Assessment

Central Concepts

Additional Related Concepts

Textbook References

Benchmarks and Standards

Extensions and Connections

Activity Credits

Requirements