B. Objects and substances can be classified by their physical and chemical properties. Mass is the amount of matter (or "stuff") in an object. Weight, on the other hand, is the measure of force of attraction (gravitational force) between an object and Earth.
The concepts of mass and weight are complicated and potentially confusing to elementary students. Hence, the more familiar term of "weight" is recommended for use to stand for both mass and weight in grades K-5. By grades 6-8, students are expected to understand the distinction between mass and weight, and use them appropriately.
Clarification for grades K-2: The use of the more familiar term ‘weight’ instead of the term “mass” is recommended for grades K-2.
Clarification for grades 3-5: In grade 3, introduce the term mass as compared to the term weight. In grade 4, investigate the concept of weight versus mass of objects. In grade 5, discuss why mass (not weight) is used to compare properties of solids, liquids and gases.
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Virtual Manipulative
STEM Lessons - Model Eliciting Activity
In this Model-Eliciting Activity (MEA), students will be presented with a catering company looking to add a new recipe using molecular gastronomy techniques. These recipes/techniques transform food into different states of matter.
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
Student Resources
Virtual Manipulative
This resource will build the following skills:
- Describe the relationship of mass and volume to density.
- Compare objects of same mass and different volume and vice versa.
- Explain that density of a certain object does not vary with its mass or volume.
- Measure the volume of an object from fluid displacement.
- Use density to identify an unknown material.
Type: Virtual Manipulative
Parent Resources
Virtual Manipulative
This resource will build the following skills:
- Describe the relationship of mass and volume to density.
- Compare objects of same mass and different volume and vice versa.
- Explain that density of a certain object does not vary with its mass or volume.
- Measure the volume of an object from fluid displacement.
- Use density to identify an unknown material.
Type: Virtual Manipulative