In this program, we look at the differences between solids, liquids, and gases, and at why things change state when they absorb or lose heat energy. We also look at the strange example of carbon dioxide, which doesn’t follow the same rules that that most other substances do!

Originally released by Liacos Educational Media, 2019. Streaming video file encoded with permission for digital streaming by Infobase on July 30, 2019. Link to website with Teacher's notes and Question Sheet for students available under Additional info tag.

Part A: Introduction (1:51); --Part B: Expansion and Contraction in Solids (6:53); -- Part C: Thermal Expansion in Liquids and Gases (7:25); -- Part D: Water: An Important Exception (4:03); -- Credits: Shedding Light on Heat: Episode 3—Thermal Expansion (0:26); . Part A: Introduction Part B: Expansion and Contraction in Solids Part C: Thermal Expansion in Liquids and Gases Part D: Water: An Important Exception.