Surface fires ____.
A. increase topsoil erosion
B. kill large numbers of wildlife
C. usually burn only undergrowth and leaf litter on the forest floor
D. usually burn whole trees from the base up
E. spread rapidly and can destroy most vegetation
Answer: C
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The Cuyahoga River in Ohio had been so polluted that it caught fire repeatedly from 1868-1969, including a 1952 fire that resulted in nearly $1.5 million in damages. Amazingly, other rivers in the United States also caught fire during this period. Why
didn't federal laws limiting pollution of rivers and streams prevent this pollution and these fires? A) This pollution went undetected by agents overwhelmed by the amount of work. B) The industries that polluted the water had been repeatedly fined for polluting and simply continued to ignore the laws. C) There were no federal regulations of water pollution at that time. D) The federal laws preventing water pollution did not apply to Ohio, where this occurred.
During an automobile accident, one person severely injured their leg. After being taken to the hospital, the doctor decided that they would need to be exposed to a particular form of kinetic energy to determine if it was broken. What kind of energy was needed?
A. electromagnetic B. microwave C. ultraviolet D. infrared
The largest sand dunes in dry climates can stretch
a) hundreds of meters b) tens of meters c) hundreds of kilometers