12 Oct 17 Period 1, 3, 5, 6: Chemistry Students will continue working on Part A and B ONLY of the RTE-2 Density Lab. Students must make sure they have finished the Pre-Lab: Pre-lab (includes title, purpose, materials, labeled illustration of apparatus, SDS table (safety), and procedural summary Note: Make sure students review with each other the SDS information and make sure the lab is written IN THIS ORDER. They will begin losing points for unorganized and messy lab reports. Materials: The materials for Part A and B are located at the front as well as the instructions and rulers. For part B, students are allowed to select 1 bag for their “unknown”. Data tables: Students should have data tables to record QUALITATIVE and QUANTITATIVE data. They should know what this is from lecture (review Educreations or just research online). Each part (A, B, and C) require data tables. Students need to remember, the procedure for Part C is already written, so copy it (as simplified as possible without losing the integrity of the lab procedure) and use it to create the data table for Part C. You are simply getting the same measurements but for a liquid. Graph: Once students have completed Part A and B, then can begin working on their graph. Students will use one graph for all 3 Parts. Students must use the procedure in part C to know the maximum mass and volume data needed even though they cannot do this part until I return. They should anticipate the amounts required based on the procedure written. Students should NOT look at the “scorecard” until after Part C is completed. DUE TODAY: Students must Seesaw their Data table page and an image of how they took the mass and volume for one of the cubes – preferable if the mass and volume photos were side by side in a collage. These TWO posts are due by the end of the day 3 pm cut off. One submission per group but all students in the group must be tagged. Make sure you add a caption describing the post. Submissions are completed as a group so all students in the group must be tagged. Even if they have not finished both parts, I should see that great progress has been made. ADDITIONAL REQUIRED WORK for students who finish early and/or cannot stay on task and need to work independently: If students finish early, have them work together in partners and take notes on chapter 3.4 on Density from the red Chemistry book in the back. They should answer the section questions 50 – 56 on the back of their notes. They MUST show their work. They can turn it into a red bin (sitting on the teacher lab bench). If they finish with this, students should read and take notes on chapter 3.1 – 3.3 to review measurements as they may need to re-learn concepts covered on their recent unit 1 exam. Scores should be in the gradebook, Skyward. And if they have mastered measurements, students should read and take notes on chapters 2.1 – 2.3 on MATTER. BEFORE STUDENTS LEAVE: Stop at least 5 minutes before class ends to have students return ALL materials to the correct location at the front of the room. Also, do a quick check for the following equipment:
10 total laptops along the walls of the lab benches
6 triple beam balances
8 electronic balances
13 Oct 17
You will have a substitute again today. See yesterday's plans for location of materials and end of day "check" of materials/equipment.
Please finish Parts A and B of the lab, work with lab partners
creating a graph
prepping Part C data tables for Monday
brainstorming what you are learning in this lab to modify your purpose
making a list of observations you noted about your data, claims and evidence to use in your conclusion
Part A: The actual densities for the cubes are on the folded sheets in the small plastic bin where the cubes were stored.
Use the instructions that come with the box of cubes to note the actual/accepted/theoretical values of the materials.
It may be ideal to have another data table that lists the types of cubes, the actual density according to the company, your measured and calculated density, and your percent error.
SHOW YOUR WORK for percent error.
This data table should be located after the data table for Part A and B where you collected measurements and before your graph.
Make sure your calculations are labeled appropriately to clearly identify what all the numbers indicate and use units and significant figures.
Part B: Use the laptop or your cell phone to google "density of common metals"(see the sample links below) and post a photo of your unknown metals on Seesaw and in your caption identify the metal and use your evidence to support your claim. Also, note the actual density, experimental density and the percent error you calculated.
When you are done, work with your partner and use the red Chemistry books in the back of the room to review 3.4 on density problems and work through some and post an example problem and how you solved it on Seesaw for VOC points. A sample density problem will be one of the quizzes next week. We will review on Monday.