Access Point #: SC.8.P.8.Su.1

Recognize three states of matter, including solids, liquids, and gases.
General Information
Number: SC.8.P.8.Su.1
Category: Supported
Date Adopted or Revised: 02/08
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.

Related Benchmarks

This access point is an alternate version of the following benchmark(s).

Related Courses

This access point is part of these courses.
2002100: M/J Comprehensive Science 3
2002110: M/J Comprehensive Science 3, Advanced
2003010: M/J Physical Science
2003020: M/J Physical Science, Advanced
7820017: Access M/J Comprehensive Science 3
2002055: M/J Comprehensive Science 1 Accelerated Honors
7920030: Fundamental Integrated Science 1

Related Resources

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

Lesson Plans

It's Just a Phase: Water as a solid, liquid, and gas:

In this lesson, students use BBs to represent molecules and model water in the solid, liquid, and gaseous states. Background information for teachers is provided.

Type: Lesson Plan

The movement of particles in solids, liquids, and gases.:

Students will be able to describe the motion of the particles in solids, liquids, and gases.

Content statements:
- The particles of a gas move quickly and are able to spread apart from one another.
- The particles of a liquid are able to move past each other.
- The particles of a solid are not able to move out of their positions relative to one another, but do have small vibrational movements.

Type: Lesson Plan

Unit/Lesson Sequences

Middle School Chemistry Unit | Chapter 2 | Changes of State:

Students help design experiments to test whether the temperature of water affects the rate of evaporation and whether the temperature of water vapor affects the rate of condensation. Students look in detail at the water molecule to explain the state changes of water.

Type: Unit/Lesson Sequence

Middle School Chemistry Unit | Chapter 1 | Matter—Solids, Liquids, and Gases:

Students are introduced to the idea that matter is composed of atoms and molecules that are attracted to each other and in constant motion. Students explore the attractions and motion of atoms and molecules as they experiment with and observe the heating and cooling of a solid, liquid, and gas.

Type: Unit/Lesson Sequence

Student Resources

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Parent Resources

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