Conservation of Mass: Counting Atoms, Particle Models and Balancing Extensions
A 53-page printable physical-science unit for grades 6-8, moving from atoms and formulas to particle models, chemical reactions, conservation of mass, and open versus closed systems.
Includes ten lessons with teacher guidance, student notes and practice, exit tickets, printable atom tiles, two quick checks, a model-and-CER project with scoring guide, a 24-card sorting activity, a unit test and detailed answer keys. The ZIP includes the PDF and a quick-start text guide. No slides or editable files are included.
Suggested pacing is 15 class periods, or approximately 13 without the two balancing extensions; adjust for your class. Use printed pages, pencils and atom tiles or drawings. No laboratory equipment is required for the paper activities; an optional teacher-only candle demonstration is described. Sample mass data are illustrative rather than actual measurements.
The teacher guide maps activities to NGSS ideas. Lessons 8-9 on symbolic balancing go beyond the MS-PS1-5 assessment boundary and are clearly marked as extensions. This is not an independently certified alignment or a validated assessment; suggested score ranges and timing are planning guidance.
One teacher may print and copy for their own classes and share with their own students through a password-protected class platform. Public posting, resale and sharing with other teachers are prohibited by the included license.
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Conservation of Mass: Counting Atoms, Particle Models and Balancing Extensions
A 53-page printable physical-science unit for grades 6-8, moving from atoms and formulas to particle models, chemical reactions, conservation of mass, and open versus closed systems.
Includes ten lessons with teacher guidance, student notes and practice, exit tickets, printable atom tiles, two quick checks, a model-and-CER project with scoring guide, a 24-card sorting activity, a unit test and detailed answer keys. The ZIP includes the PDF and a quick-start text guide. No slides or editable files are included.
Suggested pacing is 15 class periods, or approximately 13 without the two balancing extensions; adjust for your class. Use printed pages, pencils and atom tiles or drawings. No laboratory equipment is required for the paper activities; an optional teacher-only candle demonstration is described. Sample mass data are illustrative rather than actual measurements.
The teacher guide maps activities to NGSS ideas. Lessons 8-9 on symbolic balancing go beyond the MS-PS1-5 assessment boundary and are clearly marked as extensions. This is not an independently certified alignment or a validated assessment; suggested score ranges and timing are planning guidance.
One teacher may print and copy for their own classes and share with their own students through a password-protected class platform. Public posting, resale and sharing with other teachers are prohibited by the included license.
Product Details
Grade Levels: Grade 6, Grade 7, Grade 8
Subject: Science
Subject Topics: Science - Chemistry
Resource Type: Worksheets, Assessments, Unit Plans, Lessons
Number of Pages: 53
Teacher Answer Key: Yes
File Formats Included:
PDF
,
ZIP
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