Physical Science · Chemical Reactions
Chemical Reactions: Evidence & Conservation
Analyze before-and-after property data to decide whether a chemical reaction occurred, then use particle models to explain atom conservation.
Lesson plan
Chemical Reactions: Evidence & Conservation
A step-by-step guide to help you teach this lesson.
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Lesson overview
What students will learn
- Analyze before-and-after characteristic-property data to determine whether the evidence supports that a chemical reaction occurred.
- Build and use a particle model showing atoms regrouping into products while the total number of each atom type remains unchanged.
Key science ideas
- Pure substances have characteristic properties that can help identify them.
- A pattern of changed properties before and after substances interact can support the conclusion that new substances formed.
- One observation alone may be ambiguous, so analyze the full dataset.
Lesson at a glance
- Grade 6
- 55 min
- ~10 min prep
- MS-PS1-2 · MS-PS1-5
- 4 materials
What’s included
- Lesson Plan
- Investigation
- Teacher Slides
- Printable Worksheet
- Teacher Answer Key
- Interactive Activity
- Vocabulary