Homework: None :)
Today in class, we generally continued on with the Alka-Seltzer lab that we began on Friday. We had part one of the lab for homework. Then, Mr. Paek began to go over with us, as a class, part two of the lab. Mr. Paek stressed the importance of writing a procedure so that "if your mom were to come into the classroom and didn't know anything about chemistry, she coud complete the lab step by step."
We then went over the post-lab questions to part two. We identified the variables of the lab:
-Independent: (what you change) amount of water
-Dependent: (what you measure): time
-Control: (what you keep the same): amount of alka-seltzer, film canister, the location of the experiment, type of liquid, temperature of liquid.
After this, Mr. Paek described to us how to make and record a data table: you think about what you're changing (that's a column), what you're recording (that's another column). You put in your correct data and bam, it's as simple as that! An example for part two of the lab would have two columns: amount of water and reaction time in seconds.
Then we got to finish the third and final question of the second part of the lab, which brought us to part three.
Using the same partners we had on Friday, we got into our groups and began to conduct part three of lab. This part of the lab is a chance for us to create our own experiment with the alka-seltzer. We got to choose the independent and dependent variable with our partner, and began to conduct our labs. We recorded our data and began to work on the writing part of the third part of the lab, which is the experimental design. This includes:
1. Problem
2. Hypothesis
3. Variables
4. Procedure
5. Data
6. Conclusion
Tomorrow in class, we're taking the first twenty minutes to type this up. The experimenting brought us to the end of the class, and that was it for today!
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