What happens to a river as it flows through a delta and encounters the sea?
A) The discharge and water velocity increase.
B) The maximum sediment grain size carried by the river increases.
C) The total sediment load carried by the river decreases.
D) All of these are correct.
C) The total sediment load carried by the river decreases.
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If spreading centers are creating new seafloor in the center of the ocean basins, then the oldest sediment and rocks will be found on the seafloor ____ .
A ) farthest from the spreading center B ) closest to the spreading center C ) within 500 kilometers of hot spots D ) over 2500 kilometers from hot spots
In a battery, the following two oxidation-reduction reactions are taking place: rxn A: Zn ? Zn+2 + 2e- rxn B: 2 NH4+ + 2e- ? 2 NH3 + H2 Which reaction is taking place at the cathode?
A) rxn A B) rxn B C) Both reactions are happening at both the anode and cathode. D) Both reactions are happening are happening at the electrode. E) The reaction takes place at the electrode, not the cathode.
What valuable commodity has yet to be commercially mined from ocean sediments?
A) Natural gas B) Gravel C) Diatomaceous earth D) Manganese nodules
Climate change contributes to water pollution in some areas because of local changes in precipitation.
Answer the following statement true (T) or false (F)