Kettle holes are formed by
A) scouring.
B) abrasion.
C) ice that melts after having been buried by glacial sediments.
D) solution of limestone by glacial meltwater.
Answer: C) ice that melts after having been buried by glacial sediments.
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Because it is a metal, lead is not a major air pollutant.
Answer the following statement true (T) or false (F)
Which of the following correctly describes a stream's capacity?
a - it varies tremendously from time to time b - it depends mostly on fluctuations in the volume and velocity of flow c - it is defined as a volume of sediment passing a given point during a given time d - it is the potential load a stream can transport e - it is correctly described by all of the above
In desert biomes, flowering usually coincides with
A. Santa Ana winds. B. cool summers. C. migration of monarch butterflies. D. moisture availability.
In the lower troposphere
A) causes lung irritation, asthma, and susceptibility to respiratory illness in humans. B) is not associated with transportation. C) has not been found to cause any damage to crops and plants. D) forms acid rain.