Blog

(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

(08.04 MC) What will the outcome be if pH values continue to decrease in oceans?

(06.02 MC) Which of the following best describes how a thermal inversion would impact human health?

(06.01 MC) Before selling a house, a contractor seals cracks in the foundation. He also installs a system to pressurize the house to blow air from upstairs to the basement. The contractor is most likely hoping to

(07.02 MC) Between 1932 and 1968, a chemical factory in Japan released mercury-laden wastewater into Minamata Bay. The mercury was modified to methylmercury by bacteria living in bottom sediments. This resulted in severe mercury poisoning in over 2,000 people. Since people don’t eat bottom sediments, what is the best explanation for how toxic levels of mercury ended up in affected people?

(06.05 MC) Deena rides the bus for long periods of time to get to work in very loud urban city. She also attends every music concert that comes to town or nearby. During the last conversation with her brother Donovan, she had trouble hearing him unless he raised his voice a bit. Which of the following could have contributed to her trouble with hearing his normal speaking voice?   Frequenting many music concerts Yelling at Donovan when he would aggravate her Using public transportation every day to go to work  

(07.02 MC) After a large chemical spill occurred after an earthquake causing cadmium to be released into an aquatic environment and waters used for drinking. Which of the following describes an impact this could have on a population?