7.1 Lesson 6 Individual Argument
Source 1
Explaining another phenomenon.
You watched the video of the elephant’s toothpaste, which was the result of combining three different ingredients together: potassium iodide (a substance), a mixture of hydrogen peroxide and water, and soap (a mixture).
To help us figure out what is going on, here are the results from tests of different combinations of the three ingredients.
Source 2
Since combination C was the only one that produced bubbles, we will analyze a video showing what else happens when those two ingredients are combined.
Question 1
Watch this second video and record your observations below.
Source 1.1
Source 1.2
Group 2
Use these two resources: a) your observations__ and b) your key model ideas to make an argument to answer this question: __
Question 2a
After combining these ingredients what could have caused the mass of the system to change?
Question 3a
Use these three resources: a) your observations, b) your key model ideas, and c) the data table in your notebook of Some Common Gases, to make an argument to answer this question:
What gases could not have been produced in this process?
Question 4a
Another student claims that the gas that was produced in this process was methane. If you wanted to collect additional evidence to either help support or refute this claim you would need additional data. Use the data table in your notebook of Some Common Gases, to make an argument to answer this question:
Describe one additional test you could do that would help you collect additional data. How could the results help you either support or refute the student’s claim?
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