When high or low tidal currents begin to change direction, it is called:a
Ebb water
b. Flood water
c. Slack water
d. Stagnant water
ANS: C
Slack water occurs when the tidal currents shift in direction. This is a period of no current in itself.
Information can be found in the section The Dynamic Theory of Tides Adds Fluid Motion Dynamics to
the Equilibrium
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The present topography of the Appalachian mountains is due to ____
a. Cenozoic orogenies b. Mesozoic volcanism c. Cenozoic uplift and erosion d. Cenozoic volcanism e. glacial retreat
A dryline is a stalled cold front
a. true b. false
The World Wildlife Federation claims the world surpassed its sustainable level around
A) 1960. B) 1970. C) 1980. D) 1990. E) 2000.
Which of the following best explains why urbanization has led to larger and more frequent floods?
A. rainwater tends follow roadways and becomes more concentrated B. heat island effect of cities produces more frequent rains C. rainfall volume is naturally higher over areas where vegetation is more sparse D. large areas of land are covered with impermeable surfaces E. irrigation of yards and landscaping