Debris flows or mudflows are created on volcanoes when ash mixes with water from heavy rains or melted glaciers. We call these flows ________.
A. avalanches
B. lahars
C. hummocks
D. nuée ardentes
Answer: B
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Which of the following best matches the description?Increases in the amount of material at successively higher trophic levels.
A. macronutrients B. organophosphate C. micronutrients D. chlorinated hydrocarbon E. biomagnification F. biocide G. persistent pesticide H. rodenticide I. micronutrient J. pheromone K. hard pesticide L. herbicide M. soft pesticide N. weed O. auxin P. fungicide Q. macronutrient
What is the purpose of marine protected areas?
A) to reduce erosion of the seafloor B) to provide safe havens for marine life C) to shield the shoreline from crashing waves D) to designate zones for recreation and tourism
The special symbol to indicate a strike on a geologic map is a ____
A)short line oriented at 90 degrees from the strike direction B)short line oriented at 45 degrees from the strike direction C)short line parallel to the strike direction D)long line oriented in the appropriate compass direction E)long line oriented toward north
How is the Enhanced Fujita Scale used to classify tornadoes?