There has been some success demonstrated in controlling lava ...

[renzo156]

There has been some success demonstrated in controlling lava flows by using ____.
   a. water to harden the leading edge of the flow
   b. bulldozed trenches for the lava flow to follow
   c. high explosives to disperse the lava over a wide area to cool
   d. levees of older lava to funnel the flow into a valley
   e. aerial bombing of the volcano caldera

Question 2

Harmonic tremors are ____.
   a. strong earthquakes generated by an eruption
   b. strong aftershocks generated after an eruption
   c. the effect of magma dome collapse
   d. weak earthquakes that precede an eruption
   e. the effect of large gas emissions

[LegendaryAnswers]

Answer to Question 1

ANSWER: a

Answer to Question 2

ANSWER: d