B. When matter is changed physically, generally no changes occur in the structure of the atoms or molecules composing the matter.
C. When matter changes chemically, a rearrangement of bonds between the atoms occurs. This results in new substances with new properties.
Clarification for grades K-5: The target understanding for students in the elementary grades should focus on Big Ideas A and B.
Clarification for Grades 6-8: The target understanding for students in the middle grades should begin to transition the focus to: C. When matter changes chemically, a rearrangement of bonds between the atoms occurs. This results in new substances with new properties.
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Virtual Manipulative
STEM Lessons - Model Eliciting Activity
In this Model-Eliciting Acivity (MEA), students will investigate different types of hamburger patties and choose the one that is best for the restaurant. Some of the areas that students will examine is how the hamburger patties undergo a chemical change, but mass is not lost only changed into different substances. They will also investigate how the hamburger patties are chemically changed due to a change in temperature. Students will also be exposed to how the Law of Conservation of Mass is used in our daily lives. For example, cooking a hamburger patty, the mass is not lost but sometimes the juices are separated from the meat. Also, in French fries, matter is not created but cooking oil is absorbed by the fries.
Model Eliciting Activities, MEAs, are open-ended, interdisciplinary problem-solving activities that are meant to reveal students’ thinking about the concepts embedded in realistic situations. MEAs resemble engineering problems and encourage students to create solutions in the form of mathematical and scientific models. Students work in teams to apply their knowledge of science and mathematics to solve an open-ended problem while considering constraints and tradeoffs. Students integrate their ELA skills into MEAs as they are asked to clearly document their thought processes. MEAs follow a problem-based, student-centered approach to learning, where students are encouraged to grapple with the problem while the teacher acts as a facilitator. To learn more about MEAs visit: https://www.cpalms.org/cpalms/mea.aspx
Original Student Tutorials Science - Grades K-8
Understand and demonstrate that mass is conserved when substances undergo physical and chemical changes in a closed system with this interactive tutorial.
Student Resources
Original Student Tutorial
Understand and demonstrate that mass is conserved when substances undergo physical and chemical changes in a closed system with this interactive tutorial.
Type: Original Student Tutorial
Virtual Manipulative
This activity will allow you to practice balancing a chemical equation. You will have to make sure you are following the law of conservation of mass and recognize what can change to balance an equation.
You can:
- Balance a chemical equation.
- Recognize that the number of atoms of each element is conserved in a chemical reaction.
- Describe the difference between coefficients and subscripts in a chemical equation.
- Translate from symbolic to molecular representation.
Type: Virtual Manipulative
Parent Resources
Virtual Manipulative
This activity will allow you to practice balancing a chemical equation. You will have to make sure you are following the law of conservation of mass and recognize what can change to balance an equation.
You can:
- Balance a chemical equation.
- Recognize that the number of atoms of each element is conserved in a chemical reaction.
- Describe the difference between coefficients and subscripts in a chemical equation.
- Translate from symbolic to molecular representation.
Type: Virtual Manipulative