Interactive, scaffolded model
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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.
Additional Related Concepts
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
Created by CC Project: SAM using Molecular Workbench