Spheroidal weathering refers to ____
a. rounded boulders left by weathering along joints
b. rounded holes or caves left in sandstone cliffs due to hydration
c. rounded rocks split into two halves by thermal expansion and contraction weathering
d. weathering by round salt crystals
a
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The Superfund Act was designed to make polluters pay for cleaning up hazardous waste, but taxpayers are now paying for their cleaning.
Answer the following statement true (T) or false (F)
Which of the following entered the core after having been in the periphery?
A) Canada B) Mexico C) Brazil D) Portugal E) Thailand
cT air masses usually form
A) in summer. B) in high-latitude areas. C) in moderately cool areas. D) large quantities of rain-producing clouds.
A student is attempting to draw several resonance structures for a species. Which of the following is allowed?
A) Change the number of paired and unpaired electrons. B) Move electrons from one location to another. C) both a and b D) neither a nor b