Middle School

Chemical changes, physical changes

Explore chemical and physical changes, by creating a reaction in a bag!  See if you can determine if it’s a chemical or physical change based on the observations you can make and the data provided!


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Learning Objectives

Students will know

  • Chemical changes
  • Physical changes

Students will understand

  • Common indicators of physical changes
  • Common indicators of chemical changes

Students will be able to

  • Perform a reaction and use provided data about reactants and products to determine if a chemical or physical change occurred.
Standards Alignment + Connections

Next Generation Science Standards Connections

MS-PS1-2: Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.

Texas Essential Knowledge and Skills Connections

7.6: The student is expected to distinguish between physical and chemical changes in matter.

How to Run the Experiment

Materials You Will Need

  • 3 tsps. baking soda (sodium bicarbonate)
  • ½ cup vinegar (acetic acid)
  • ¼ cup warm water (H2O)
  • Sandwich Ziploc bag
  • Tissue or paper towel
  • Food coloring (optional)

Additional Resources