Final answer:
The effectiveness of bleach as a disinfectant can be tested by swabbing surfaces before and after cleaning and culturing bacteria to measure growth reduction. A hypothesis could be that bleach significantly reduces bacteria, which is supported by a substantial decrease in post-cleaning bacterial growth.
Step-by-step explanation:
The question seeks to compare the bacterial presence on different surfaces before and after cleaning with bleach, commonly known as Chlorox. A scientific investigation could involve swabbing the surface of the band handle, chromebooks, and toilet seat before and after cleaning with bleach. This would then be followed by culturing the bacteria in a controlled environment to measure and compare the growth of bacterial colonies. The effectiveness of bleach as a disinfectant can be determined by observing the reduction in the number of bacteria present after cleaning.
One hypothesis could be that bleach will significantly reduce the number of bacteria on all surfaces. To support this hypothesis, post-cleaning samples would show a substantial decrease in bacterial growth compared to pre-cleaning samples. Conversely, if the post-cleaning samples do not show a significant decrease in bacterial growth, this would refute the hypothesis.
Toilet bowl cleaners, including those with bleach, are designed to not only clean but also disinfect surfaces. They can effectively convert calcium carbonate deposits into soluble salts, which then can be easily rinsed away, reducing the presence of bacteria that may reside on such deposits.