Activity Number
305
Editable
Overview and Learning Objectives
Classroom Practice
Central Concepts
Benchmarks and Standards
Extensions and Connections
Activity Credits
Requirements

Phase Change (2-day, 9-page activity from the SAM project)

Interactive, scaffolded model

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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.

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Overview and Learning Objectives

Students review the atomic arrangements for each state of matter, following trajectories of individual atoms to observe their motion and observing and manipulating differences in attractions among the atoms in each state. Then students experiment with adding energy to effect a change in state. They finish by exploring the more complex phenomena of latent heat and evaporative cooling.

Students will be able to:

• Give example of phase changes that occur every day and how they affect the world around us.

• Describe what the phases of matter (solid, liquid, and gas) look like at the atomic level.

• Explain how the forces of attraction are what keep atoms in a particular phase at a specific temperature.

• Explain how the input of energy into a system affects the state of matter.

• Describe how both latent heat and evaporative cooling play a role in changes of phase.

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Classroom Practice

Teacher's Guide

http://sam.concord.org/publications/teacher-guides/phase_changes.ver6.pdf

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Central Concepts

Key Concept:

Additional Related Concepts

Physics/Chemistry

  • Latent heat
  • States of Matter

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Benchmarks and Standards

NSES

  • Physical-Science: Matter Structure/Properties - 5 Solids, liquids, and gases differ in the distances and angles between molecules (Full Text of Standard)

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Extensions and Connections

Fermi Lab's ARISE Project suggests the following enhancement to this SAM unit: http://www.concord.org/~barbara/SAM/ARISE/ARISE_SAM_phase_change.pdf

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Activity Credits

Created by CC Project: SAM using Molecular Workbench

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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.

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NSF Logo
These materials are based upon work supported
by the National Science Foundation under grant numbers
9980620, ESI-0242701, EIA-0219345, DUE-0402553, and 0628181.

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.