* 1. Please identify the school where you performed the Biotoxicity laboratory:

* 2. In what grade are you currently enrolled?

* 3. After performing this hands-on activity, please rate how well you understand the following:

  Not at all A little Mostly Very
The gas carbon dioxide is a byproduct released from cells as their mitochondria convert glucose into ATP for energy.
The amount of carbon dioxide produced can be determined by measuring pressure because for a gas, the pressure (P) is related to the number of moles of the gas (n) through the ideal gas law: PV =nRT
Light is a spectrum characterized by its wavelength, and interacts with materials differently. In this experiment, yellow light has a wavelength that interacts with the silver nanoparticles of a specific size, allowing us to recognize the optimal nanoparticle solution when it turns yellow.
Please offer your explanation to the following questions:

* 4. The result of your experiment should suggest that silver nanoparticles less than 20 nm in diameter are more effective in killing yeast cells than silver powder, with diameters in the millimeter range. Provide one reason for why nanoscale silver is more effective:

* 5. Which parameter of the ideal gas law (PV= nRT) does the height of the manometer tube represent when you collect your data in this experiment?

* 6. In this experiment, we approximated that the yeast cells produce carbon dioxide at a constant rate. List at least two ways in which you can increase the cells’ carbon dioxide production rate:

* 7. You just discovered a drug that kills cancer cells, but this drug by itself can’t penetrate the membrane to get inside the cell, where the drug can be effective. Using the lesson you learned in this experiment, suggest one method by which you can help the drug penetrate the cell membrane.

* 8. Identify any concepts that you might have better understood after performing this activity:

* 9. On a scale from 1 to 4, where 1 means "not at all" and 4 means "very much", rate the following:

  1 2 3 4
Did you find the science you learned in this activity interesting?
Do you want to learn more about how to modify material properties?
How well can you explain silver nanoparticle is a good in killing microbes to someone who doesn’t know (perhaps a younger sibling)?

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