Worldwide, scientists estimate that there are about 125,000 known seamounts, many of which originated at ________ centers
A) erosional
B) metamorphic
C) sedimentary
D) volcanic
E) seismic
D
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Groundwater is water found pooling on the ground as puddles, ponds, or lakes.
Answer the following statement true (T) or false (F)
This is a photograph of Augustine volcano in Alaska. Judging by its shape, and the eruptive activity in the photo, what kind of volcano is it?
A) shield volcano B) cinder cone C) composite volcano D) volcanic neck
Read the following paragraph to answer the question:The Mt. St. Helens eruption in Washington state in 1980 measured 5 on the volcanic explosivity index (VEI). Only 57 people died from the Mt. St. Helens since most people were warned to evacuate the area prior to the event. Four years later, in 1985, Nevado del Ruiz in Colombia erupted. While only measuring 3 on the VEI, the eruption resulted in 25,000 deaths when unsuspecting residents of local towns were overrun by fast-moving lahars.Which of the following statements about volcano-related deaths best fit the information given in the paragraph?
A. Volcanic eruptions often kill thousands of people. B. The death toll from volcanic eruptions do not always correlate to explosivity, and can be affected by human actions before and after the eruption. C. The death toll from a volcanic eruption is directly related to its volcanic explosivity index (VEI). D. Most volcano-related deaths occur from lahars.
Jointed igneous rocks would be most likely drained by a:
a. dendritic drainage pattern b. rectangular drainage pattern c. parallel drainage pattern d. radial drainage pattern