Phenomena such as floods, tornadoes, and volcanic eruptions are some of Earth's __________ __________, defined as those elements of the physical environment, harmful to people and caused by forces extraneous to them
Fill in the blank(s) with correct word
natural hazards
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The major goal of the U.S. earthquake hazard reduction program is to
A) develop an earthquake warning system for southern California B) reduce earthquake hazards through understanding of risks and prediction of hazards C) federally enforce seismic building codes in active areas D) determine the roots of human perceptions of earthquakes
The moment magnitude is more accurate than the classical Richter scale because it is tied directly to physical parameters such as fault-rupture area, fault slip, and energy release, and because other earthquake scales use indirect measures such as how much a seismograph needle moves.
Answer the following statement true (T) or false (F)
Barchans ____
a. are a type of longitudinal dune b. have slip faces oriented parallel to the average wind direction c. have arms that point downwind d. are typically stabilized by vegetation
Obsidian exhibits a ________ texture
A) glassy B) fine-grained C) coarse-grained D) porphyritic