Law of Conservation of Mass Activity with Reading

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This Resource Includes the Following Sections:

1. Introductory reading on the law of conservation of mass (matter)
2. Follow-up questions to check for understanding
3. A supporting activity using EASY SUPPLIES! Students write a focus question and hypothesis, then follow a simple procedure to observe changes in apples that demonstrate the law of conservation of mass. They’ll collect data on included data sheets and answer analysis questions with claims/evidence/reasoning. (This part of the activity will be ongoing over several weeks.)

Easy-Easy–Easy Supplies:

• 2 apples
• 2 glass jars (spaghetti sauce and pickle jars work great)
• triple beam balance or digital scale

Teacher Notes:

• Related NGSS Science & Engineering Practices: Developing and using models; Planning and carrying out investigations; Analyzing and interpreting data
• This law of conservation of mass activity is intended for the middle school level.
• INCLUDES ANSWER KEY.
• Includes a digital Google Slides option to assign!
• Please note: this resource is not editable.
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Related Standards:

• NGSS MS-PS1-2: Analyze and interpret data on the properties of substances before and after interaction to determine if a chemical reaction occurred.
• NGSS MS-PS1-5: Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.