Activity Number 85
Not Editable
	Important Notice!
	Overview and Learning Objectives
	Assessment
	Central Concepts
	Textbook References
	Benchmarks and Standards
	Extensions and Connections
	Macro Micro Link
	Activity Credits
	Requirements

Mass Spectroscopy

Interactive, scaffolded model

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Java 1.4+ - Java 1.4+ is available for Windows, Linux, and Mac OS X 10.3 and greater.

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	Important Notice! You need to have your QuickTime preference set for Enable Flash if you upgraded to 7.1.3. return to top



	Overview and Learning Objectives The activity offers students an opportunity to manipulate the central variables in mass spectroscopy, which operates on the principle that moving ions may be deflected by a magnetic field and hence identified. This model demonstrates how the force exerted on each ion depends upon the strength of the magnetic field, the velocity with which the ion is moving, and its charge. Students will be able to: • separate the moving ions according to their mass-to-charge ratios; • explain the role of the magnetic field in the deflection of moving ions; • explain why the angle of deflection is proportional to the mass-to-charge ratio. return to top



	Assessment Pre-post Test: http://www.concord.org/~barbara/workbench_web/pdf/mass_spec_assess3.pdf RUBRIC http://www.concord.org/~barbara/workbench_web/pdf/mass_spec_rubric_8.6.07bt.pdf return to top



	Central Concepts Key Concept: The angle of deflection in a mass spectrometer is proportional to the substance's mass-to-charge ratio. Additional Related Concepts Biology Sickle Cell Anemia Physics/Chemistry Charge Ion Magnetism Mass return to top



	Textbook References Cell Biology (Pollard and Earnshaw) Saunders 2002 - Chapter Five: Research Strategies return to top



	Benchmarks and Standards NSES Physical-Science: Energy/Matter Interactions - 2 Electromagnetic waves result when a charged object is accelerated or decelerated (Full Text of Standard) return to top



	Extensions and Connections Go to http://www.chemguide.co.uk/analysis/masspec/elements.html to see examples of mass spectra of elements. To see uses of mass spectroscopy, visit http://www.dartmouth.edu/~cehs/indexTE.html return to top



	Macro Micro Link http://www.skipwagner.net/smbiotech/samples/friendlytext.htm A good general, though high level (AP or higher) introduction. return to top



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



	Requirements Java 1.4+ - Java 1.4+ is available for Windows, Linux, and Mac OS X 10.3 and greater. 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.

Mass Spectroscopy

Important Notice!

Overview and Learning Objectives

Assessment

Central Concepts

Additional Related Concepts

Textbook References

Benchmarks and Standards

Extensions and Connections

Macro Micro Link

Activity Credits

Requirements