# Access Point #: SC.5.P.8.In.2

Identify examples of materials that will dissolve in water and those that will not.
General Information
Number: SC.5.P.8.In.2
Category: Independent
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. 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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## Lesson Plan

Solve the Dissolving Problem:

In this lesson, students will be experimenting what independent variable will affect dissolving rates; students will compare results of peers to also determine materials that dissolve and do not dissolve from 5 given materials; and, students will identify and learn what controls in an experiment are and their importance. This is a multi-part lesson that can be broken down by day or presented in one block. Complete all Part As in each phase (Teaching/I Do/Know, Guided/We Do/Understand, Independent/You Do/Do) before Part Bs. This lesson does not address the reference/research component of SC.5.N.1.1.

Type: Lesson Plan

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