Siliceous oozes are examples of A. biogenous sediments B. lithotrophic sediments C. volcanic emanations D. terrigenous sediments. The structure of the water molecule A. has the hydrogens directly opposite each other, bonded to an oxygen in the middle B. has the hydrogens bonded to each other, and the oxygen bonded to only one of the hydrogens C. has the hydrogens both bonded to an oxygen in the middle, but not directly opposite each other D. None of the above 6. The amount of energy needed to vaporize one gram of water at 100 deg C A. is quite large compared to most liquids B. is quite small compared to most liquids C. is small because of the large amount of salt that is found in it D. is about average among liquids 7. In any natural body of water A. the density of all layers must be equal. B. the densest water moves to the top C. the least dense water moves to the top D. the densest water becomes colder 8.
Lithogenous sediment is A. derived from rock.
B. derived from plants and animals. C. always found at depths over 4,500 meters. D. always associated with deep-sea trenches E. a product of precipitation from sea water. A. increases B. decreases C. remains constant D. becomes less uniform E. is less graded 10. Manganese nodule mining has not developed because of A. low international market prices for metals.