Maintaining Mass Lesson Overview
Students will first view and then hypothesize, based on their knowledge of the law of conservation of mass, why a teacher demonstration does not seem to prove the law. Students will then explore a modified version of the experiment to determine ways that the teacher demonstration should have been changed to show conservation of mass effectively.
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| Duration 90 Minutes |
Setting Classroom |
Grouping Whole Class, Pairs |
PTI Inquiry 1.1, 1.3, 2.4, 2.5, 3.1, 5.2, 5.8, 6.1, 7.3 |
| Lesson Components | Time | Inquiry Skills | Tech. Used | Engage Level | Brief Description |
|---|---|---|---|---|---|
| Engage | 10 min | 1.3, 5.2 | Projector, YouTube | 3 | Students will view time lapsed videos of both a building being built and a plant growing and will answer questions about their observations. |
| Explore | 30 min | 1.1, 2.5, 3.1 | Document Camera, Digital Scales | 3 | Students will observe a teacher demonstration and then complete an experiment to show evidence of conservation of mass during a chemical change of matter. |
| Explain | 20 min | 7.3 | none | 2 | Students will compare and contrast the two experiments and answer questions, discussing their answers and additional observations with the class. |
| Expand | 20 min | 6.1, 2.4, 5.8 | Digital Scales | 3 | After creating a plan, students will modify teacher demonstration to make it properly describe conservation of mass. |
| Evaluate | 10 min | none | 1 | Students will answer 5 assessment questions related to evidence of conservation of mass. |
| Level of Student Engagement | ||||
|---|---|---|---|---|
| 1 | Low | Listen to lecture, observe the teacher, individual reading, teacher demonstration, teacher-centered instruction | ||
| 2 | Medium | Raise questions, lecture with discussion, record data, make predictions, technology interaction with assistance | ||
| 3 | High | Hands-on activity or inquiry; critique others, draw conclusions, make connections, problem-solve, student-centered | ||
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