Ryan demonstrates physical and chemical changes in various ways, such as tearing paper, melting chocolate, and baking a cake. He explains that physical changes result in no new substances being formed while chemical changes create new substances. Examples of chemical changes include rusting iron, burning wood, and fireworks.
1. The text describes different examples of physical changes, such as ripping paper, melting chocolate, and crumpling paper.
2. The text also discusses chemical changes, such as baking a cake or burning wood and producing carbon dioxide and water vapor.
3. A chocolate remote control and a rainbow made of torn paper are made by the narrator.
4. The narrator makes a cake for their dad's birthday and adds blue frosting.
5. The narrator asks their dad if expired milk is a physical or chemical change, and the answer is a chemical change due to bacteria in the milk producing lactic acid.
6. The text includes sound and visual effects, such as music and fireworks.