How does a lid affect what happens to the liquid in the cup?
- Do Now– Get out your ISN and add to the Table of Contents- “Initial Model” p.32 (Left Side). Head p.32 properly with “Initial Model- 11/7/19.″
- Investigation– Cup Lid 2- Develop a new plan by recording variables and procedures on “Procedure: Measuring Changes in Mass in the Cups” handout. Make predictions by completing the first row in the data table on the handout- “Do you think the amount of matter in this system will change over 5 minutes’ time? Review how & where to record data. Review science safety precautions. Carry out Cup Lid Lab 2. Pool the class data by calculating averages and recording them on the data table in the handout. Analyze the data & make claims by completing the “Making Sense” section of the handout: “Which system lost mass? Matter has mass. So what matter may have left the system(s) that lost mass?” Have a Making Sense Discussion. Record the definitions of Open System and Closed System on ISN p.33. Tape the handout as a flip page to ISN p.33.
- Initial Model– Use the handout “Initial Model of Mass Loss in the Cup with No Lid” to develop an individual model that would answer the question: What is happening to the liquid water that can explain why the mass of the cup system decreases over time? Read the directions together. Use the space to develop your model and answer the prediction question.