What are the health, safety, and environmental issues that many common household cleaning products pose? Explain and provide examples.

What constitutes an 'environmentally friendly cleaning product? Explain. Discuss the

difference, if any, between environmentally-friendly and non-toxic

What environmentally-friendly, non-toxic products are available on the market that could

serve as an adequate replacement for the more toxic products? Explain and provide

examples. Include one example of a natural cleaning product that is safe and effective for

cleaning knives.

• Why might someone choose to use environmentally-friendy products rather than non-

environmentally friendly products? Why might someone choose to use non-

environmentally friendly products rather than switching to environmentally-friendly

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.