The Volcanic Explosivity Index (VEI) is based on
A. the height to which the pyroclastics rose in the atmosphere.
B. the volume of pyroclastics produced.
C. the length of the eruption.
D. All the choices are correct.
Answer: D
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The concept of isostacy explains why ____.?
a. ?magnetic differences exist in stripes along the seafloor b. ?magma plumes are created c. ?continental crust stands higher than oceanic crust d. ?convection moves magma under the lithosphere e. ?lithospheric plates move in response to convection
What process explains how hydrothermal vents are created?
a. Fracture zones b. Conduction c. Convection d. Pressure
Australia is known around the world for having marsupial animals
Indicate whether the statement is true or false
Resilience is the ability of an ecosystem to recover from a disturbance.
Answer the following statement true (T) or false (F)