Reflection: Rigor Chemical and Physical Changes Lab - Section 3: Investigation (Lab)

 

This lab gives the kids an opportunity to use the data they created (observations) and try and figure out the type of reaction it is (chemical vs. physical). Their observations are critical and you may need to help them to record accurate, unemmotional data (it did nothing!). You may also need to help them understand that no visible event (vinegar + water) is still a reaction, it would just be a physical reaction (increase in volume). In this case they are using Science and Engineering Practice 4: Analyze and Interpret Data and Practice 6: Constructing Explanations and Designing Solutions.

  NGSS Practices
  Rigor: NGSS Practices
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Chemical and Physical Changes Lab

Unit 2: States of Matter
Lesson 5 of 5

Objective: Students will be able to use evidence to determine if a reaction is a chemical or physical change.

Big Idea: Five reactions will be created and observed by groups of students. Collected evidence will be used to figure out which reactions are chemical changes and which reactions are physical changes.

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  95 minutes
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