Earthquake - has hypocenters and epicenters - may be preceded by ground deformation - measured by magnitude and intensity scales - most frequent in alaska and volcanoes
Volcanoes - cannot be predicted accurately - measured by an explositivity index - cause a visible fume or steam cloud or both - often cause steam or gas to erupt in the atmosphere - caused by molten rock erupting through earth’s surface
A theory of evolution that states that a species evolves in spurts of rapid change and then goes through periods of no change is known as <span>punctuated equilibrium.</span>
