In 2010, agriculture accounted for about ________ percent of U.S. employment
A) 0.5
B) 1.6
C) 5.1
D) 10.1
B
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Conical marine organisms that lived during the Cambrian and were the earliest builders of reeflike
structures:a. protists d. sponges (porifera) b. cyanobacteria e. archaeocyathids c. brachipods
Read the following paragraph to answer the question:The Mt. St. Helens eruption in Washington state in 1980 measured 5 on the volcanic explosivity index (VEI). Only 57 people died from the Mt. St. Helens since most people were warned to evacuate the area prior to the event. Four years later, in 1985, Nevado del Ruiz in Colombia erupted. While only measuring 3 on the VEI, the eruption resulted in 25,000 deaths when unsuspecting residents of local towns were overrun by fast-moving lahars.How much more volcanic material was released by the Mt. St. Helens eruption compared to Nevado del Ruiz?
A. Ten thousand times more B. A hundred times more C. Ten times more D. Twice as much
In which setting is karst topography most likely to feature steep pillars, knobs, and oddly shaped rocks?
A. polar B. mid-latitude C. arid D. tropical
The largest area of karst in the United States is included in
A. Texas. B. Mississippi. C. Minnesota. D. Florida.