Students measure and graph mass/weight in order to gather evidence to make a claim that regardless of the type of physical change that occurs, matter is not created or destroyed and mass/weight is conserved.
5-PS1-2 Measure and graph quantities to provide evidence that regardless of the type of change that occurs when heating, cooling, or mixing substances, the total weight of matter is conserved. (Clarification Statement: Examples of reactions or changes could include phase changes, dissolving, and mixing that form new substances.) [Assessment Boundary: Assessment does not include distinguishing mass and weight.]
In the first two activities, students measure and graph substances before and after changing the shape, melting ice, and making mixtures to gather evidence to support a claim about the Law of Conservation of Matter/Mass. In the next two activities, students measure and graph substances before and after a chemical change to gather evidence to support a claim about the Law of Conservation of Matter/Mass. Students are then presented with an extra challenge to list examples of different types of changes that support the Law of Conservation of Matter/Mass.
This series of lessons/assessments includes:Background information for teachers, Teaching notes, 5 lessons and rubrics for scoring student work, Student recording pages, Science Notes for students to read, Teaching Poster, and an extension lesson.
All pages may be viewed at scienceandkidsactivities.com