What material makes up the shells of many marine microorganisms?
A) NO2
B) CaCO3
C) SiO2
D) NaCl
Answer: B
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The Rocky Mountains
A) are significantly lower in elevation than the Appalachian Highlands B) are adjacent to the Piedmont C) features mountain-building, alpine glaciation, and erosion D) traverse the Great Lakes E) are found running parallel to the Atlantic coastline
Which animal is the only herbivorous marine mammal?
a. sea otter b. sea lion c. walrus d. manatee e. baleen whale
Several students are discussing the role of governments and their ability to address major problems. With your experiences in environmental science, you speak up and note that one way the U.S
federal government has impacted our lives is by passing landmark legislation dramatically improving the quality of natural waterways. In fact, in 1972, one of the most important environmental laws ever passed was the A) Lakes, Rivers, and Streams Act. B) Water Pollution Control Act. C) Rivers and Harbors Act. D) Clean Water Act.
A home located about 500 feet from an abandoned landfill explodes in a giant ball of flames. This is a mystery, as the home only uses electricity for cooking and heating the home. Most likely, this disaster was caused by
A) groundwater contamination from the landfill into the home. B) biogas that seeped from the landfill along horizontal cracks and into the home. C) gasoline or other flammable substances that leached from the landfill into the home. D) corrosives that leached from the landfill into the home and degraded the home's electrical wires.