Atoms, Molecules, and Reactions
Grade 6•45 minutes
Learning Objective
I can build a model to show that the number of atoms stays the same during a chemical reaction, so mass is conserved.
Practice Questions
This lesson includes 7 practice questions to reinforce learning.
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1. Explain the difference between a physical change and a chemical change, providing an example of each that was NOT mentioned in the video.
2. Describe a scenario where a substance undergoes a change in state (e.g., solid to liquid) and explain why this is a physical change.
3. Identify three indicators that a chemical reaction has taken place.
...and 4 more questions
Educational Video
Chemical and Physical Changes – Quiz Edition
Next Generation Science