Question

a new factory has been constructed near a large, still lake that is home to many species of fish and other wildlife. although environmental regulations prohibit the dumping of toxic chemicals from the factory into the lake, these prohibitions are poorly enforced and chemicals are continuously dumped into the lake. once the chemicals are in the lake, they diffuse through the water. which group of fish will most likely be affected by the toxic chemicals first? fish at location b. all the fish in the lake will be affected at the same time. fish at location a. after the factory has been open for a few months and has been continuously dumping toxic chemicals into the lake, you measure the concentration of these chemicals at various locations within the lake. how will the concentrations of toxic chemicals in the lake differ at locations a and b? high at a, lower at b. same at a and b high at a, zero at b. high at b, lower at a eventually a group of students from a nearby school succeed in pressuring authorities to stop the factory from dumping any more chemicals in the lake. however, they do not devote any money or resources to cleaning out the chemicals that have already been dumped into the lake. after a few more months, you measure the concentrations of the chemicals again at various locations within the lake. how will the concentrations of chemicals in the lake differ at locations a and b? high at a, lower at b high at b, lower at a zero at a and b same at a and b

Explanation:

Step1: Analyze first - affected fish

The factory is dumping chemicals near location A. Due to diffusion starting from the source, fish at location A will be affected first as they are closest to the point of chemical entry into the lake.

Step2: Analyze chemical concentration after months of dumping

After continuous dumping for months, the chemicals will diffuse throughout the lake. In a still lake, over time the concentration will become evenly distributed, so the concentration at A and B will be the same.

Step3: Analyze concentration after dumping stops

When dumping stops, without any cleaning, the chemicals remain in the lake and continue to be evenly distributed in the still - water environment, so the concentrations at A and B will still be the same.

Answer:

1. Fish at location A
2. Same at A and B
3. Same at A and B