Elephant Toothpaste Assessment

Last updated 4 months ago

4 questions

You watched the video of the elephant’s toothpaste, which was a reaction that created bubbles and heat and 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.

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. Record observations about the video in question 1, which can be found below the video.

Observations about the video. Bullet points are fine.

Use these two resources: a) your observations and b) your key model ideas to make an argument to answer this question:
After combining these ingredients what could have caused the mass of the system to change?

Use these three resources: a) your observations about the gas' flammability, 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?

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:
How can you test this student's claim?
What could you learn from the results of your test?

Elephant Toothpaste Assessment

Observations about the video. Bullet points are fine.

Use these two resources: a) your observations and b) your key model ideas to make an argument to answer this question:After combining these ingredients what could have caused the mass of the system to change?

Use these three resources: a) your observations about the gas' flammability, 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?

Use these two resources: a) your observations and b) your key model ideas to make an argument to answer this question:
After combining these ingredients what could have caused the mass of the system to change?

Use these three resources: a) your observations about the gas' flammability, 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?