Big Idea 9: Changes in Matter

Electrolysis is the decomposition of a solution by using a electrical current. Chemical changes occur during this process. The electrodes act a conductors where electron transfer take place. The flow of electrons are from the anode (positive electrode-the site of oxidation), to the cathode (negative electrode - site of reduction). Students will explore chemical changes by observing the Electrolysis of potassium iodide, copper (II) bromide, and sodium chloride solutions. Students will use their observations to identify the products formed at the anode and the cathode in the electrolysis of each solution.

Type: Learning Goal

In this lesson, students will conduct observational and experimental investigations to differentiate between physical changes and chemical change. Students will make and record observations as well as identify experimental variables. Students will conduct several investigations to help them to understand the differences between chemical and physical changes. Students will record investigative observations and use their observations to provide evidence that a physical or a chemical change has occurred.

Type: Lesson Plan

The student will demonstrate that mass is conserved when substances undergo chemical and/or physical changes through experimentation and evaluation of experimentation procedures. Students will be able to analyze the demonstration and provide evidence for or against the law of conservation of mass.Students will first view and then hypothesize, based on their knowledge of the law of conservation of mass, why a teacher demonstration does not seem to prove the law. Students will then explore a modified version of the experiment to determine ways that the teacher demonstration should have been changed to show conservation of mass effectively.

Type: Lesson Plan

This is a lesson about chemical and physical changes encountered on a daily basis.

Type: Lesson Plan

In this Model-Eliciting Activity (MEA), students will identify the best material to use for playground equipment by analyzing the physical changes that happens to each type.

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

Type: Lesson Plan

In this POE lesson, students will explore different visual and verbal representations of physical and chemical changes to predict the definition and indicators of the types of changes, observe the different changes, and explain how their definition compared to that of the class.

Type: Lesson Plan

This yummy lesson on physical and chemical changes will require students to apply their scientific knowledge to a backyard treat.

Type: Lesson Plan

This lesson is a set of two activities:

1. The conservation of mass is illustrated during a teacher demonstration of dissolving salt into water. The mass of the system will be calculated before and after the substances are combined so that students can compare them. Students investigate whether mass stays the same, increases, or decreases during the physical change.
   
   
2. Students complete a paper atom and molecule activity showing the connection between a proper balanced equation and the conservation of mass. Students will use paper atom manipulatives to show the relationships between the reactants and products of a chemical reaction. The balancing of a chemical reaction is the conservation of mass in action.

Type: Lesson Plan

In this lesson students will investigate how temperature influences chemical reactions. Students will conduct an investigation and complete a simulation to determine what is happening at the molecular level of a chemical reaction when there is a change in temperature.

Type: Lesson Plan

This predict, observe, and explain lesson allows students to investigate the influence of temperature on the rate of reactions. Students will have the opportunity to perform a lab activity that will help them discover that as temperature increases, so does reaction rate. This lesson includes a reaction rate demonstration, probing questions throughout the lesson, a meaningful class discussion, and a final product. Students will use what they've learned in the lab, to apply it everyday examples where reaction rates are influenced by temperatures.

Type: Lesson Plan

While not explicitly stated in the standard, the idea that the Law of Conservation of Mass is conditional to a closed system and this is the focus of my lesson. This lesson starts with an investigation of seeds growing in a jar with students quickly recording the mass each day for 5 days. On the 5th day, students complete 2 more investigations, half with closed systems and half with open systems. They will compare the final masses and draw conclusions independently and through class discussions about the condition of the Law of Conservation of Mass.

Type: Lesson Plan

This lesson has students conduct 11 different experiments, make observations of changes, and determine whether a physical or chemical change has occurred. The experiments allow students to observe different kinds of physical changes (changing state, dissolving, change size) and chemical changes (color change, new substances formed).

Type: Lesson Plan

The focus of this lesson is for students to gain an understanding of how to identify if changes in matter are a physical or chemical change. Also, students will see that the mass before and after a physical and chemical changes will be the same which supports the Law of Conservation of Mass. The lesson consists of teacher demonstrations, student lab activities. a writing activity to support student findings and the creation of presentations for students to share their results and applications of concepts to the real world.

Type: Lesson Plan

This activity allows students to test the reaction rate of a chemical change using an effervescent tablet in different temperatures of water.

Type: Lesson Plan

This lesson is is used to introduce students to the concepts of physical and chemical changes in substances. The lesson instructs students how to identify which type of change has taken place. The lesson also contains an opportunity for students to produce a substance change and identify this as being a chemical or physical change.

Type: Lesson Plan

Students will conduct an investigation on the effect of laundry detergent on water temperature, use technology to graph their data, and determine whether a physical or chemical change occurred. Students will also read articles to gather evidence to write an evidence-based claim using the CLEVER method.

Type: Lesson Plan

The students make observations and take the mass of various structures constructed by the teacher. They rearrange the structures and measure the mass again. During the whole class discussion the students come to understand that during a chemical or physical change the mass is conserved.

Type: Lesson Plan

In this lesson, students will learn the difference between physical and chemical changes and their relationship to the Law of Conservation of Mass. The major concept that students should learn is that mass is conserved when substances undergo a physical or chemical change (Law of Conservation of Mass).

Type: Lesson Plan

Students must select a tranquilizer dart to be used by the US Fish and Wildlife Service for researching large animals. Next, they must help the US Geological Survey choose a new drilling device. Each projectile has varying characteristics based on the temperature of the chemicals inside. Students must select which temperature lends itself to a reaction suitable for service in animal research or geological studies. Other factors due to temperature come into play as well, such as density and melting point.

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.

Type: Lesson Plan

Students will use this kinesthetic activity to further their knowledge regarding balancing chemical equations.

Type: Lesson Plan

At the end of this lesson, students will be able to list the signs of a physical or chemical change and have a high degree of confidence in their ability to recognize them and differentiate between them in daily life.

Type: Lesson Plan

Physical changes do not change what things are made of, but chemical changes do change what things are made of.

Type: Lesson Plan

Used to assess prior knowledge of chemical change and physical change.
** THIS IS LESSON 1 IN A SERIES OF 4 LESSONS. **

Type: Lesson Plan

During a physical change, particles at the microscopic level, re-arrange themselves, but no new substance is formed. During a chemical change, particles are broken apart and the atoms are re-arranged into new particles, thereby forming a new substance.

Type: Lesson Plan

This activity may also be used as a demonstration lab, if materials aren't available, time, or other problems exist.

Type: Lesson Plan

Students work through different activities examining the changes of physical and chemical and how mass is conserved.

Type: Lesson Plan

The students will demonstrate understanding of the Laws of Conservation of Mass by drawing conclusions based on their observations.

Type: Lesson Plan

In this Model-Eliciting Acivity (MEA), students will investigate different types of hamburger patties and choose the one that is best for the restaurant. Some of the areas that students will examine is how the hamburger patties undergo a chemical change, but mass is not lost only changed into different substances. They will also investigate how the hamburger patties are chemically changed due to a change in temperature. Students will also be exposed to how the Law of Conservation of Mass is used in our daily lives. For example, cooking a hamburger patty, the mass is not lost but sometimes the juices are separated from the meat. Also, in French fries, matter is not created but cooking oil is absorbed by the fries.

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

Type: Lesson Plan

Students will describe how temperature influences chemical changes.

Content statements:
- Increasing the temperature will cause chemical changes to occur faster.
- Decreasing the temperature will cause chemical changes to occur slower.

Type: Lesson Plan

In this open inquiry activity, students will explore what it is that keeps a diaper-wearer "dry" and whether it is chemical change or physical change.

Type: Lesson Plan

Students will find evidence to support the Law of Conservation of Mass which states that matter is neither created nor destroyed, it only changes form.

Type: Lesson Plan

Investigate how temperature affects the rate of chemical reactions in this interactive tutorial.

Type: Original Student Tutorial

Understand and demonstrate that mass is conserved when substances undergo physical and chemical changes in a closed system with this interactive tutorial.

Type: Original Student Tutorial

Learn to distinguish a physical change from a chemical change in this interactive tutorial.

Type: Original Student Tutorial

This PowerPoint covers the basics of physical and chemical properties as well as physical and chemical changes with examples and sections for student involvement.

Type: Presentation/Slideshow

This resource describes activity that will allow students to observe the effects of a chemical change as opposed to a physical change. It also gives them the opportunity to observe conservation of matter by modeling chemical equations. The main learning objective is the recognition that all chemical reactions create new molecules and that in a chemical reaction the original atoms get rearranged, bonding together in different ways.

Type: Teaching Idea

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.

Type: Unit/Lesson Sequence

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.

Type: Unit/Lesson Sequence

A collection of crossword puzzles that test the knowledge of students about some of the terms, processes, and classifications covered in science topics

Type: Video/Audio/Animation

This activity will allow you to practice balancing a chemical equation. You will have to make sure you are following the law of conservation of mass and recognize what can change to balance an equation.
You can:

• Balance a chemical equation.
• Recognize that the number of atoms of each element is conserved in a chemical reaction.
• Describe the difference between coefficients and subscripts in a chemical equation.
• Translate from symbolic to molecular representation.

Type: Virtual Manipulative