Tens of thousands of people were killed in the 1991 Pinatubo eruption because of a lack of prediction of the eruption
Indicate whether the statement is true or false
FALSE
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________ production is a direct conversion of solar energy to electricity
A) Renewable energy B) Ethanol energy C) Fast-acting electric D) Photovoltaic electric E) Solar constant
Pesticide use has tripled in the past 40 years, yet pests still cause extensive damage to crops. Why has this increased use of pesticides not been more effective?
A) Increases in ultraviolet radiation and global warming break down pesticides faster. B) The widespread use of pesticides has resulted in the evolution of pesticide-resistant pests. C) The pesticides in use today are much less powerful due to government regulations. D) The pesticides available are no longer suited for the most common types of pests.
Which of the following phenomena is NOT a precursor used to predict earthquakes in the dilatency model?
a. seismic velocity b. rate of isostatic rebound c. radon gas emission d. frequency of foreshocks
Ocean crust is denser than continental crust because ocean crust is ________
A) composed primarily of granite B) thicker than continental crust C) thinner than continental crust D) composed primarily of basalt