1. If a sediment's contents is 55% opaline silica, what is the sediment commonly termed
- Calcareous ooze
- Pteropod ooze
- Siliceous Ooze
- Pelagic Clay
1 of 12
Other questions in this quiz
2. Why do dissolved oxygen concentrations decrease as deep water formed in the Atlantic ages during its transport to the Pacific Ocean?
- Because the oxygen diffuses up to the surface and out into the atmosphere faster than it is transported in the bottom water currents moving towards the Pacific Ocean.
- Oxygen is adsorbed by inorganic particles
- Bacteria organisms use oxygen during respiration/decomposition of organic matter
- Because the deep water warms significantly beteween the Atlantic and Pacific Ocean.
3. What is the main reason why water sinking in polar regions has a high oxygen concentration?
- Mainly because the waters in polar regions have a lower salinity than the rest of the ocean
- Mainly because oxygen is more dense than any other gas, causing the water to sink
- Mainly because the water is very cold and so the solubility of oxygen is enhanced
- Mainly because phytoplankton abundance is very high in polar regions and so oxygen is supersaturated due to photosynthesis
4. Which of the following statements is FALSE?
- Most of the particulate matter falling to the ocean floor is from minerals supplied as wind borne dust.
- Much of our information about the nature and distribution of sinking particulate organic matter in the water column comes from material collected in sediment traps.
- Marine snow is an aggregate of detritus, living organisms and some inorganic matter.
- The concensus between marine scientists is that the oceans are chemically in a steady state
5. Why can phytoplankton not grow below depths of about 100-200 m
- There is not enough light .
- There are not enough nutrients
- The pressure is too great
- The water is too cold