Question 14 chapter 3.2.2. and figure 3.23. in an erupting column of ash, what is the convective ascent region? a. the region in which particles of all sizes are propelled upwards by the rapid expansion and release of trapped gases the region where the relative buoyancy of the hot volcanic gases is higher than the cooling surrounding atmosphere and so carries smaller particles further upwards. o c. the region where cooling in the higher atmospheric levels eventually causes the pl ume to become neutrally buoyant and so bread out laterally d. the region where upward momentum carries particles above the neutral density level. question 15 chapter 3.2.1. since mars and mercury are smaller than earth and thus have a smaller gravity, how does this influence lava flows on these planets compared to earth? oavolcanic flows on mercury and mars tend to be thicker. o b volcanic flows on mercury and mars tend to be thinner. o c. volcanic flows on mercury and mars tend to be hotter. o d. volcanic flows on mercury and mars tend to be cooler. question 16 chapter 3.3.4. what is cryovolcanism? o a when a volcanic explosion sends an avalanche of hot rocks down the sides of a volcano e b. when volcanic eruptions occur under the sea o c. the eruption of magma the derives from ice rather than molten rock when a volcano erupts on a planet with no atmosphere