TITLE
Essential Science for Teachers: Physical Science: Session 2. The Particle Nature of Matter: Solids, Liquids, and Gases

CLIP DESCRIPTION
This segment shows an example of probing questions about phenomena to find out if the student thinks that the air being generated in a closed container comes from the solid material (dry ice) in the container. The interviewer uses a series of questions and 2 different examples to try and elicit the idea that they are the same substance but in a different form.

INSTRUCTIONAL CATEGORY/
CRITERION
[Category 2 ]
Building on Student Ideas

PROGRAM DESCRIPTION
What simple idea links together all of chemistry and physics? How can a close study of the macroscopic differences among solids, liquids, and gases support a microscopic model of tiny, discrete, and constantly moving particles? In this session, participants learn how the "particle model" can be turned into a powerful tool for generating predictions about the behavior of matter under a wide range of conditions.

RIGHTS
Corporation for Public Broadcasting. All Rights Reserved.

PUBLISHER
Annenberg/CPB