All About Matter: Chemical vs. Physical Changes
Students will be able to differentiate between physical and chemical changes. Students will be able to differentiate between physical and chemical properties of matter.
- Begin the lesson by asking your students what physical and chemical changes they have seen in the environment.
- Tell your students that they will be learning about the physical and chemical changes and properties of matter.
Explicit Instruction/Teacher Modeling(30 minutes)
- Pass out the What's the Matter worksheet to your students.
- Go over the changes and properties with your students.
- Explain each change and property to your students with an example.
- An example of a physical change would be shape. You can explain that shape is a physical property. For example, a rectangle can be broken down into triangles, but it would still contain the same amount of mass.
- Go over and explain the physical and chemical changes to your students on page 2 in the What's the Matter packet.
Guided Practice/Interactive Modeling(40 minutes)
- Conduct the experiment on the second page of the What's the Matter packet.
- Ask your students to answer the questions about the experiment on the What's the Matter worksheet with a partner.
- Go over the questions as a class.
Independent Working Time(10 minutes)
- Ask your students to write the definition of each word on page 4 of the packet.
- Ask your students to write a paragraph explaining why the metabolism of food is a chemical change. Have them research the metabolism of food before writing the paragraph.
- Show your students one example of a physical change and one example of a chemical change through a drawing. An example could be fireworks for a chemical change and cutting a paper for a physical change.
- Ask your students to complete the Chemical vs. Physical Properties worksheet.
Review and Closing(20 minutes)
- Ask your students to pick an object. Have them think of a physical change or chemical change that the object could go through. Instruct your students to write two properties that would change as a result of the change.
- Ask your students to share what they wrote with the class.