# SC.4.P.8.3

Explore the Law of Conservation of Mass by demonstrating that the mass of a whole object is always the same as the sum of the masses of its parts.
General Information
Subject Area: Science
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.

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. 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 of Last Rating: 05/08
Status: State Board Approved

## Related Courses

This benchmark is part of these courses.
5020050: Science - Grade Four (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current))
7720050: Access Science Grade 4 (Specifically in versions: 2014 - 2015, 2015 - 2018, 2018 - 2023, 2023 and beyond (current))
5020110: STEM Lab Grade 4 (Specifically in versions: 2016 - 2022, 2022 and beyond (current))

## Related Access Points

Alternate version of this benchmark for students with significant cognitive disabilities.
SC.4.P.8.In.3: Identify that a whole object weighs the same as all of its parts together.
SC.4.P.8.Su.3: Recognize that the parts of an object can be put together to make a whole.
SC.4.P.8.Pa.3: Recognize that some objects have parts.

## Related Resources

Vetted resources educators can use to teach the concepts and skills in this benchmark.

## Lesson Plan

Observing a Physical Change:

In this lesson, students are shown the difference between physical and chemical changes by dissolving and crushing seltzer tablets. Students learn to recognize that physical changes involved changes in size, shape, or texture, while chemical changes involve the formation of a new substance.

Type: Lesson Plan

## Original Student Tutorial

Brick Masters- The Law of Conservation of Mass:

Explore the Law of Conservation of Mass using your favorite building blocks in this interactive tutorial.

Type: Original Student Tutorial

## Unit/Lesson Sequence

Measuring Mass:

In this unit, students will first do research and study the Law of Conservation of Mass and learn how to form a hypothesis. After they learn how to form a hypothesis, they will use balance beams to measure clay and crayons.

Type: Unit/Lesson Sequence

## Original Student Tutorials Science - Grades K-8

Brick Masters- The Law of Conservation of Mass:

Explore the Law of Conservation of Mass using your favorite building blocks in this interactive tutorial.

## Student Resources

Vetted resources students can use to learn the concepts and skills in this benchmark.

## Original Student Tutorial

Brick Masters- The Law of Conservation of Mass:

Explore the Law of Conservation of Mass using your favorite building blocks in this interactive tutorial.

Type: Original Student Tutorial

## Parent Resources

Vetted resources caregivers can use to help students learn the concepts and skills in this benchmark.