Why does the velocity of a stream generally increase downstream even though the gradient decreases?
Velocity generally increases downstream because channels are generally smoother downstream and because stream volume tends to increase as more tributaries enter downstream.
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Which of the following have become terranes?
a. island arcs and ocean ridges b. seamounts c. fragments of other continents d. island arcs, ocean ridges and seamounts e. island arcs, ocean ridges, seamounts and fragments of other continents
Because of the combination of gravitational and inertial forces, tides are unpredictable
Indicate whether the statement is true or false
Waves of energy emitted at the focus of an earthquake are called:
a. Earthquake waves b. Shockwaves c. Seismic waves d. All of the above e. Both a and b
Tuvalu and the Maldives are in the international spotlight because they ________
A) are the largest emissions producers in their respective areas B) have exceeded the emissions reductions set by the Kyoto Protocol C) are accepting climate change refugees from other nations D) opposed China's proposals for global carbon neutrality at the Copenhagen Conference in 2009 E) may be among the first nations to be completely flooded by rising sea levels