Standard #: SC.8.P.8.8


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Identify basic examples of and compare and classify the properties of compounds, including acids, bases, and salts.


General Information

Subject Area: Science
Grade: 8
Body of Knowledge: Physical Science
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

Related Courses

Course Number1111 Course Title222
2002100: M/J Comprehensive Science 3 (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current))
2002110: M/J Comprehensive Science 3, Advanced (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current))
2003010: M/J Physical Science (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current))
2003020: M/J Physical Science, Advanced (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current))
7820017: Access M/J Comprehensive Science 3 (Specifically in versions: 2014 - 2015, 2015 - 2018, 2018 and beyond (current))
2002055: M/J Comprehensive Science 1 Accelerated Honors (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current))
7920030: Fundamental Integrated Science 1 (Specifically in versions: 2013 - 2015, 2015 - 2017 (course terminated))


Related Access Points

Access Point Number Access Point Title
SC.8.P.8.In.8 Identify common acids, such as lemon juice and vinegar, and bases, such as baking soda and ammonia, and their hazardous properties.
SC.8.P.8.Su.7 Recognize common acids, such as vinegar, and bases, such as ammonia, and their hazardous properties.
SC.8.P.8.Pa.4 Recognize common acids as safe or harmful.


Related Resources

Lesson Plans

Name Description
It's All About That Base and Acid

This is an 8th grade science activity in which students will perform a variety of tests to determine the properties of different acids and bases.

Experiment with pH of Unknown Substances

The inquiry method is used for students to gather data and problem solve to determine the identify of unknown pH values to be used to construct a pH value chart.

The What and How of Compounds

This lesson helps students to differentiate between compounds and mixtures. This lesson will also help students understand how compounds are held together.

What are you made of? Students will learn about known elements and discover the products that can be made when those elements react.
Mystery Powder Investigation

Students will use their skills as scientists to identify a mystery white powder. This lesson is a hands-on, engaging way to build students' understanding of physical and chemical properties of several common compounds.

Properties of Acids and Bases In this lesson students will learn about the properties of acids and bases in relationship to the pH scale.

Original Student Tutorial

Name Description
Cooking with Chef Ragu: Acids, Bases, and Salts

Join Chef Ragu as he learns about acids, bases, and salts while he cooks up something special. In this interactive tutorial you will compare and classify the properties of compounds that are acids, bases, and salts and identify basic examples of these compounds.

Text Resource

Name Description
Acids and Bases Are Everywhere

This informational text resource is intended to support reading in the content area. This informational text on acids and bases takes difficult content and explains it clearly with the aid of several simple diagrams. It explains the pH scale and how the chemists Arrhenius, Bronsted, and Lowry have contributed to our understanding of acids as donors and bases as acceptors.

Unit/Lesson Sequences

Name Description
Chemical Change Investigations | Inquiry in Action In this series of 10 investigations, students gain experience with the evidence of chemical change - production of a gas, change in temperature, color change, and formation of a precipitate. Students begin by observing that similar-looking powders can be differentiated by the way they react chemically with certain test liquids. Students then use their chemical tests and observations to identify an unknown powder and, in a follow-up activity, to identify the active ingredients in baking powder. Students continue to explore chemical change by using a thermometer to observe that temperature either increases or decreases during chemical reactions. Then they control these reactions by adjusting the amount of reactants. In another set of activities, students use the color changes of red cabbage indicator to classify substances as acids or bases, neutralize solutions, and compare the relative acidity of two different solutions. Students conclude the investigation by comparing a precipitate to one of the reactants that formed it. Students see that a new substance was created during the chemical reaction. Information and questions about photosynthesis and cellular respiration are included as examples of chemical changes on pages 316-318 of this resource.
Middle School Chemistry Unit | Chapter 6 | Chemical Change Students explore the concept that chemical reactions involve the breaking of certain bonds between atoms in the reactants, and the rearrangement and rebonding of these atoms to make the products. Students also design tests to investigate how the amount of products and the rate of the reaction can be changed. Students will also explore endothermic and exothermic reactions.

Virtual Manipulative

Name Description
pH Scale

Students can test the pH of several substances and visualize hydronium, hydroxide, and water molecules in solution by concentration or the number of molecules. Students can add water to a given substance to see the effects it will have on the pH of that substance; or they can create their own custom substance.

Student Resources

Original Student Tutorial

Name Description
Cooking with Chef Ragu: Acids, Bases, and Salts:

Join Chef Ragu as he learns about acids, bases, and salts while he cooks up something special. In this interactive tutorial you will compare and classify the properties of compounds that are acids, bases, and salts and identify basic examples of these compounds.

Virtual Manipulative

Name Description
pH Scale:

Students can test the pH of several substances and visualize hydronium, hydroxide, and water molecules in solution by concentration or the number of molecules. Students can add water to a given substance to see the effects it will have on the pH of that substance; or they can create their own custom substance.



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