**Subject Area:**Science

**Grade:**8

**Body of Knowledge:**Physical Science

**Idea:**Level 2: Basic Application of Skills & Concepts

**Big Idea:**Properties of Matter - A. All objects and substances in the world are made of matter. Matter has two fundamental properties: matter takes up space and matter has mass which gives it inertia.

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.

**Date Adopted or Revised:**02/08

**Date of Last Rating:**05/08

**Status:**State Board Approved

**Assessed:**Yes

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## Original Student Tutorial

## Tutorial

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## STEM Lessons - Model Eliciting Activity

In this Model-Eliciting Activity (MEA), students will select a glider model that will meet the needs of a Summer Space Camp program.

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

In this Model-Eliciting Activity (MEA), students will evaluate wheel designs from different companies to determine which wheel is appropriate for the mission. Further 3D printing is integrated by 3D printing different wheel models which can be directly tested using a LEGO Mindstorms Robot or Simple Rubber Band Powered Sled and different Regolith Simulants for the Moon and Titan.

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

In this MEA, students must select which material to use in the development of an advanced military scout robot. Students must analyze data about each material’s individual properties that would make it a valid choice for military or police service. Students must complete calculations to determine material density as well as the overall mass and weight of the robot. This lesson focuses on the characteristic properties of density, unit conversion, and differentiating between mass and weight.

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. Click here to learn more about MEAs and how they can transform your classroom.

## Original Student Tutorials Science - Grades K-8

Differentiate between weight and mass, recognizing that weight is the amount of gravitational pull on an object and is distinct though proportional to mass. In this interactive tutorial you'll help a curious chicken learn more about this important topic.

## Student Resources

## Original Student Tutorial

Differentiate between weight and mass, recognizing that weight is the amount of gravitational pull on an object and is distinct though proportional to mass. In this interactive tutorial you'll help a curious chicken learn more about this important topic.

Type: Original Student Tutorial

## Parent Resources

## Tutorial

This tutorial covers the difference between mass and weight.

Type: Tutorial