Activated Carbon Quiz

What should you ensure when taking photos of the solutions collected in the filtration cups after the experiment?

• Use different lighting and background for each photo.

• Ensure all photos are taken with the same lighting, background, and camera settings.

• Use a black background for better contrast.

• Take photos with different camera settings for variety.

Responsible scientists always do their experiments at least how many times to confirm that their results are reproducible?

• One time

• Two times

• Three times

• Four times

Compare the average color values that you wrote down for each experimental condition before and after the filtration. Can you see a trend in your data? Did your water samples become less colored or even colorless after filtration? Did the filtration material or the dye concentration make a difference?

• Yes, the water samples became less colored after filtration.

• No, there was no change in the color of the water samples after filtration.

• The filtration material made a difference, but not the dye concentration.

• The dye concentration made a difference, but not the filtration material.

For each type of carbon (granular carbon, powdered carbon and no activated carbon), which graph would you use to compare the observed color before and after filtration?

• Line graph

• Bar graph

• Pie chart

• Scatter plot

Comparing all your graphs, which is the more efficient filter using a contact time of 10 minutes?

• Granular carbon

• Powdered carbon

In this project you used the same amount of activated carbon for each experimental condition. Do you think the results will change when you use more, or less activated carbon? Repeat this experiment but this time vary the amount of activated carbon you put into your filters. You can either choose another amount of activated carbon for the different dye concentrations, or keep the dye concentration constant and vary the amount of activated carbon instead.

• Yes, the results will change with more activated carbon.

• No, the results will remain the same.

• The results will change with less activated carbon.

• The results will not change with varying amounts of activated carbon.

Can the activated carbon you used for your experiment be re-used for another water sample?

• Yes, it can be reused multiple times.

• No, it cannot be reused.

• It depends on the initial dye concentration.

• Only after regeneration.

What else can be filtered with activated carbon? Choose the correct option.

• Food colors

• Sand/soil and water mixture

• Oil and water mixture

• Vanilla or peppermint aroma