________ was the pyroclastic material ejected from an Icelandic volcano that caused massive disruption of transatlantic flights in 2010
A) Tephra
B) Lava
C) Magma
D) Poisonous sulfur gas
E) Steam
Answer: A
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Which of the following is true about the formation and migration of meanders?
A) Most floodplains do not preserve evidence of the former position of meanders. B) Flow velocity is highest when water takes a shortcut around the inside of a bend. C) Meanders migrate inward as sediment is deposited on the inside bend. D) Migration of meanders back and forth can help form a floodplain. E) None of these are correct.
Where the frequencies of seismic waves match the natural vibration frequencies of local geology and buildings, destruction may be great.
Answer the following statement true (T) or false (F)
Which of the following is a form of natural capital gained directly or indirectly as a result of solar energy?
a. Forests b. flowing water and wind energy c. wind energy only d. coal and oil e. forests, flowing water, wind energy, coal and oil.
By 100 CE, Rome had reached the population of
A) Two millions B) Half a million C) One million D) One hundred thousand