On what basis are Mercalli intensity values assigned to locations?
A) interpretation of seismograms
B) interpretation of the length of fault rupture
C) qualitative perceptions of and structural response to the shaking
D) proximity to the epicenter of the earthquake
C
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A polar molecule: a. has a positively-charged and a negatively-charged end
b. is neutrally charged all around. c. does not have a negative or positive charge. d. occurs only in frigid environments.
Individual retirees who travel south for the winter and return north during the summer are evidence of two types of migration patterns. What are they?
What will be an ideal response?
Auroras are mainly visible at lower latitudes, from the equator to about 15° N/S
Indicate whether the statement is true or false
The magnetic poles of Earth are quite distant from the geographic poles
Indicate whether the statement is true or false