Internal waves are faster and have shorter periods than most wind waves.
Answer the following statement true (T) or false (F)
False
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Flash floods can be dangerous in the desert
a. True b. False Indicate whether the statement is true or false
Landslides occur when
A) a threshold is reached. B) the internal friction is overcome by the force of gravity. C) driving forces exceed resisting forces. D) all of the above E) B and C only
How are oil and gas extracted in the hydraulic fracturing process?
A)Injection of high-pressure fracking fluids increases the permeability of the rock and allows oil and gas to move into the well. B)Injection of high-pressure fracking fluids forces low-pressure oil and gas to the surface. C)Horizontal wells are drilled, and the oil and gas is pumped out. D)Injection of low-pressure fracking fluids enlarges pore spaces allowing the oil and gas to be pumped out. E)Injections of fracking fluid are used to generate small earthquakes, which shake oil and gas to the surface.
The North American continent was covered by more ice than the South American continent at the height of the Ice Age
Indicate whether this statement is true or false.