Hurricane winds rotate in a clockwise direction in ____
A) the Northern Hemisphere only
B) the Southern Hemisphere only
C) both the Northern and Southern Hemispheres
D) neither hemisphere
B
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Kettle lakes form by
A) melting blocks of ice. B) abrasion of ice. C) meltwater action under ice. D) plucking of huge rocks.
Which observation supports the theory that the planets formed from a disk shaped nebula?
A) The rocky planets are close to the Sun. B) Pluto and comets follow elliptical orbits that pass inside the orbit of Neptune. C) The planets revolve around the Sun in approximately the same plane of the ecliptic. D) The Sun is the center of the solar system.
Over the past decade, the salinity of high-latitude oceans has ________ due to________
A) increased; ocean absorption of excess atmospheric carbon dioxide and associated coral die off
B) declined; coastal erosion caused by changes in stream flow and increased precipitation
C) increased; higher evaporation rates associated with climate change
D) declined; freshwater inputs from melting ice
E) increased; changes in thermohaline circulation associated with the Pacific Decadal Oscillation
A geologist is looking at deposits along a river below a large volcano. She finds large boulders mixed with sand and mud, and all of the material is comprised of volcanic rocks, particularly the mud which is volcanic ash. She quickly realizes these deposits represent an ancient ________.
a. rock avalanche b. lahar c. slump d. earthflow