What is the most important factor used to determine the volcanic explosivity index of an eruption?
A. volume of erupted material
B. speed of erupted material
C. composition of the erupted material
Answer: A
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How do salinometers measure salinity?
A) It measures the number of salt molecules in a set mass of seawater. B) It calculates the salinity based on the density of the seawater. C) It measures the electrical conductivity of seawater samples. D) It calculates the salinity by measuring the chlorinity.
Resistance to movement or deformation of soil is called ________.
A. shear strength B. stress resistance C. solifluction D. stiffness quotient E. rigidity
The development or strengthening of a middle latitude storm system is called
a. convergence. b. divergence. c. cyclogenesis. d. frontolysis. e. frontogensis.
The H-R diagram is a diagram plotting the stars according to their
A. brightness and luminosity class. B. mass and diameter. C. apparent brightness and temperature. D. spectral type and temperature. E. luminosity and temperature.