Lesson Plan

Physical and Chemical Changes

An introduction lesson on physical and chemical changes (middle school)
Cristina C.
Classroom teacher
Valhalla Middle High School
Valhalla, NY
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My Grades 7, 8, 9, 10, 11, 12
My Subjects Science

Students will be able to describe the differences between a physical and chemical change.

Students will be able to correctly identify 10 processes as either a physical or chemical change.

substance properties
Grades 6 - 8
All Notes
Teacher Notes
Student Notes

1 Introduction

From $220

Show students the BrainPop video "Property Changes".  Explain to students that this video will introduce them to the topic of physical and chemical changes. Print out the quiz that goes along with this video.   Students will answer questions while watching the video.  At the end of the video allow students a few minutes to go back to any questions that they were not able to answer.  Review answers with students by having students hold up their answers for each question with a Plicker card.  This will allow you to see what understanding they already have and what areas they will struggle with. 

Student Instructions

As you watch the video, please answer the 10 questions on this worksheet.

2 Notes

Activity: Presenting

In whatever format you feel comfortable using, present the notes associated with physical and chemical changes.  These notes don't need to be long.  They should explain what each type of change is and some examples of each. 

3 Demonstration

Activity: Investigating

At this time, show students some examples of physical and chemical changes.  After each demonstration ask students if the demonstration was a physical or chemical change.  Have the student explain why they chose their answer.  I would also have a list of each demonstration that I am going to do at the bottom of their notes and students would write down what happened for each demonstration and why it was a physical or chemical change.

You can use whatever materials you have on hand, but here are some examples you can use.

Physical changes: heated ball and ring, boiling water, melting ice cube, mixing iced tea mix in water

Chemical changes: lighting anything on fire, mixing baking soda and vinegar, saliva breaking down a cracker

4 wrap-up/exit ticket

Create a Socrative quiz with 10 examples of chemical and physical changes.  Each student will take the quiz before they leave and simply choose either chemical or physical change.  This will give you an idea as to how much students understand the topic and which students need more help.

Feel free to use this Socrative Quiz that I have made (SOC #: 15424319) or make a copy and modify it.