Compared with water, what are the limitations wind has as an agent of erosion?
What will be an ideal response?
Water is 800 times denser than air. This observation means that the shear stresses exerted by blowing wind are much less than for flowing water. Sediment grains are also easier to move in water than in air because the grains effectively weigh less in water than in air because of the difference in fluid density.
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Which of the following is a secondary pollutant in the troposphere but a beneficial component of the stratosphere?
A) Ozone B) Carbon monoxide C) Nitrogen oxides D) Carbon dioxide
The Chicxulub impact crater was the first evidence to suggest that a meteorite impact caused the Cretaceous-Tertiary mass extinction
Indicate whether the statement is true or false
Of the following activities, which one reduces the concentration of carbon dioxide in the atmosphere?
A) respiration B) photosynthesis C) decomposition D) combustion E) volcanic activity
A high-oxygen content and a low-nutrient content in surface seawater indicate that a population of ________ are present.
A. decomposers B. phytoplankton C. bacteria D. animals E. None of these is correct; they indicate no life presence.