Blog

(07.01 MC) Tamika had added young koi fish to her waterfall pond and had them for over a year until they all suddenly started dying. She talked with a neighbor, who also had koi fish that died a few years ago at a relatively young age. Which of the following could be a possible reason for why the fish died?

(07.01 MC) Which of the following best shows the results of biomagnification from years of rainfall washing mercury (Hg) into bodies of water such as lakes, rivers, and streams?

(08.05 MC) Many national parks that allow camping prohibit people from carrying in firewood from other areas. What is the most likely reason for this?

(07.05 LC) This graph shows the dose-response curve for a lethal dose of a particular toxin: According to the graph, approximately how much larger is the LD50 dose for this toxin than the threshold level?

(07.02 LC) Which of the following would be the cause for dead fish in a lake?

(07.03 MC) Plastics contribute to 36 million tons of waste annually. Which of the following methods shows a 20% reduction due to a change to current practices?

(07.03 LC) In this diagram of a typical municipal solid waste landfill, which labeled section is part of the methane collection and removal system?

(07.02 MC) Which of the following, if performed in the vicinity of water bodies, is a likely cause of eutrophication? Raising livestock on factory farms Applying chemical fertilizers to soil Spraying chemical pesticides on crop fields

(07.01 MC) Mercury from burning fossil fuels can be found in bodies of water through air-water exchange. How do zooplankton affect the amount of mercury in tuna?

(08.01 LC) The stratosphere protects against