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(06.03 HC) The graph below shows the average blood lead levels from 0 to 60 mcg/dL in the United States between 1975 and 2005:   Analyze the graph showing the average percentage of lead blood levels in the United States from 1975 to 2005. Use the graph to answer the questions: Describe the trend of average blood lead levels in the United States between 1975 and 2005. Explain one possible reason for the high level of lead in blood tests in 1975. Explain one possible reason for the trend identified in (i). Despite the overall reduction of lead exposure in the United States, there are still areas with high lead level exposures. As of 2019, there were 10 counties in the state of New York with high incidence rates of blood lead levels above 10 micrograms per 1,000 tested children. Describe the effects of lead poisoning on long-term health. Propose one method that could reduce lead exposure at its source.

(06.04 LC) Which of the following is an effect of acid deposition on human-made monuments?

(08.05 LC) A lake located in a particular national park is found to be a habitat for an endangered species of fish. This discovery would most likely lead to which of the following events?

(06.03 MC) Recently, when you shower, you begin coughing and sneezing and your skin breaks out. Which of the following situations could lead to these effects?

(06.03 LC) The Davidson’s have a termite prevention service for their home. Mr. Davidson is concerned that their daughter may become ill from the preventative measures. What health effect could develop as a result of using pesticides?

(06.04 MC) An ecologist suspects that an otherwise healthy estuary ecosystem experienced an unusually high level of acid deposition during a rainy spring. Which of the following should the ecologist measure to help confirm her hypothesis? Changes to the population of indicator organisms The aluminum concentration in the water The temperature of the water

(08.02 MC) The two images of the McCall Glacier in Alaska depict changes to the glacier from 1958 to 2003: © EPA.gov How does the change in this glacier impact marine ecosystems?

(07.01 LC) A factory discharges waste directly into a river. Runoff containing pesticides from the surrounding region also flows into the same river. Which of the following correctly identifies the types of pollution sources described in the scenario?

(06.04 LC) Which of the following is an anthropogenic source of sulfur dioxide?

(07.06 LC) Sewage in streams and rivers that goes untreated exposes people to