Why do most tornadoes tend to travel in the same general direction?
A) They generally occur in a zone of southwest winds.
B) They have an intense pressure gradient force.
C) Tornadoes often occur to the east of the center of a midlatitude cyclone.
D) Because of their clockwise rotation.
A
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Banded iron formations precipitated in oxygen-rich ocean waters
a. True b. False
Which of the following best describes melting of the mantle at subduction zones that leads to island arc volcanoes?
A. Heat is carried downward with the subducting plate and melts the mantle above the downgoing plate. B. The subducted plate subsides into the mantle and allows magma from the lower mantle magma ocean to risetoward the surface. C. Water released from the subducting plate decreases the melting temperature in the mantle above thedowngoing plate to generate magmas from the overlying mantle wedge
As the salinity of seawater increases, its ________
A) density decreases B) density increases C) residence time increases D) residence time decreases E) residence time changes
A spring is a place where water flows naturally from rock
A. into a cave. B. farther underground. C. onto the land surface.