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.
B
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Which nation within Central Asia suffers from an extremely low Human Development Index?
A) Mongolia
B) Kazakhstan
C) Uzbekistan
D) Afghanistan
E) Azerbaijan
Which of the following types of maps would have the largest numeric scale?
A) world B) continent C) state D) city E) country
How will the flow in this image affect erosion of the stream channel?
A) Water is moving so smoothly that the sediments are carried in the center of the water current B) Turbulent flow contributes to erosion because it lifts particles from the streambed C) Water flow is not strong enough to lift sediments, so erosion is minimal D) Erosion will occur near the head of the stream, but nowhere else
The Earthquake Early Warning System (EEW) being developed on the U.S. West Coast can provide as much as ________ warning of the arrival of destructive seismic waves
A) 60 seconds B) 10 minutes C) 1 hour D) 12 hours E) 24 hours