Grade Level: 5th Grade
Students are introduced to the differences between physical and chemical changes in simple kitchen substances that react to water and indicators in characteristic ways. The observable clues that a physical change has occurred includes changes in state such as gas, liquid, or solid. The material itself is the same before and after the change. An ice cube melting is an example of a physical change.
Conduct an investigation to determine whether the mixing of two or more substances results in new substances.
Steffen, Peg, "Physical Science - CLASSROOM DETECTIVE AGENCY: Chemical Changes" (2020). Model NGSS Lessons: 4th - 5th Grade. 13.